Hippocampal SST Interneurons

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Hippocampal SST Interneurons

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  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference The preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference Hippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference but diverge sharply in...

  • 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference Hippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference but diverge sharply in...

  • 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference Hippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference but diverge sharply in...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference0 The defining feature that distinguishes hippocampal SST subtypes from one another — and from their neocortical counterparts — is the precision of their dendritic domain targeting ({ref}sec-morphological-diversity). Electron microscopy studies established that SST-immunoreactive axon terminals in the rat hippocampus preferentially contact dendrites of pyramidal cells, with approximately 76% of postsynaptic targets...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference1 O-LM cells, with somata in stratum oriens and axons ascending to stratum lacunosum-moleculare, selectively inhibit the distal dendritic tufts where entorhinal cortex inputs arrive 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2. Bistratified cells, by contrast, ramify their axons across strata radiatum and oriens, targeting the proximal and basal dendritic domains that receive Schaffer collateral input from CA3 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference3. Th...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference4 O-LM cells, with somata in stratum oriens and axons ascending to stratum lacunosum-moleculare, selectively inhibit the distal dendritic tufts where entorhinal cortex inputs arrive 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference5. Bistratified cells, by contrast, ramify their axons across strata radiatum and oriens, targeting the proximal and basal dendritic domains that receive Schaffer collateral input from CA3 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference6. Th...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference7 O-LM cells, with somata in stratum oriens and axons ascending to stratum lacunosum-moleculare, selectively inhibit the distal dendritic tufts where entorhinal cortex inputs arrive 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference8. Bistratified cells, by contrast, ramify their axons across strata radiatum and oriens, targeting the proximal and basal dendritic domains that receive Schaffer collateral input from CA3 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference9. Th...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference0 O-LM cells, with somata in stratum oriens and axons ascending to stratum lacunosum-moleculare, selectively inhibit the distal dendritic tufts where entorhinal cortex inputs arrive 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference1. Bistratified cells, by contrast, ramify their axons across strata radiatum and oriens, targeting the proximal and basal dendritic domains that receive Schaffer collateral input from CA3 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference2. Th...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference3 O-LM cells, with somata in stratum oriens and axons ascending to stratum lacunosum-moleculare, selectively inhibit the distal dendritic tufts where entorhinal cortex inputs arrive 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference4. Bistratified cells, by contrast, ramify their axons across strata radiatum and oriens, targeting the proximal and basal dendritic domains that receive Schaffer collateral input from CA3 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference5. Th...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference6 Recent work using intersectional genetic strategies has refined this picture further. 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference7 employed Sst;;Tac1 and Ndnf;;Nkx2-1 intersectional lines in mouse CA1 to dissect SST interneuron subtypes with unprecedented specificity. Sst;;Tac1 bistratified interneurons generated 85% of the inhibitory postsynaptic currents (IPSCs) recorded in CA1 pyramidal cells upon optogenetic stimulation of the general SST...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference8 Recent work using intersectional genetic strategies has refined this picture further. 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference9 employed Sst;;Tac1 and Ndnf;;Nkx2-1 intersectional lines in mouse CA1 to dissect SST interneuron subtypes with unprecedented specificity. Sst;;Tac1 bistratified interneurons generated 85% of the inhibitory postsynaptic currents (IPSCs) recorded in CA1 pyramidal cells upon optogenetic stimulation of the general SST...

  • 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference0 Complementing these cell-type-specific studies, 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference1 characterized the synaptic and dendritic architecture across hippocampal SST subtypes, estimating that an individual hippocampal SST interneuron receives approximately 15,600 synaptic inputs, of which roughly 16% are GABAergic 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference2. The input pathway selectivity of O-LM cells was further dissected by 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference3, who found that the medial entorhinal...

  • 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference4 Complementing these cell-type-specific studies, 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference5 characterized the synaptic and dendritic architecture across hippocampal SST subtypes, estimating that an individual hippocampal SST interneuron receives approximately 15,600 synaptic inputs, of which roughly 16% are GABAergic 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference6. The input pathway selectivity of O-LM cells was further dissected by 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference7, who found that the medial entorhinal...

  • 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference8 Complementing these cell-type-specific studies, 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference9 characterized the synaptic and dendritic architecture across hippocampal SST subtypes, estimating that an individual hippocampal SST interneuron receives approximately 15,600 synaptic inputs, of which roughly 16% are GABAergic 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference0. The input pathway selectivity of O-LM cells was further dissected by 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference1, who found that the medial entorhinal...

  • 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference2 Complementing these cell-type-specific studies, 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference3 characterized the synaptic and dendritic architecture across hippocampal SST subtypes, estimating that an individual hippocampal SST interneuron receives approximately 15,600 synaptic inputs, of which roughly 16% are GABAergic 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference4. The input pathway selectivity of O-LM cells was further dissected by 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference5, who found that the medial entorhinal...

  • 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference6 In the dentate gyrus, HIPP cells represent the SST subtype analogous to O-LM cells, with somata in the hilus and axonal projections targeting the outer molecular layer where perforant path inputs arrive 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference7. 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference8 demonstrated that SOM-expressing interneurons in the dentate gyrus display facilitating excitatory synaptic inputs — a property shared with neocortical Martino...

  • 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference9 In the dentate gyrus, HIPP cells represent the SST subtype analogous to O-LM cells, with somata in the hilus and axonal projections targeting the outer molecular layer where perforant path inputs arrive 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference0. 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference1 demonstrated that SOM-expressing interneurons in the dentate gyrus display facilitating excitatory synaptic inputs — a property shared with neocortical Martino...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference2 In the dentate gyrus, HIPP cells represent the SST subtype analogous to O-LM cells, with somata in the hilus and axonal projections targeting the outer molecular layer where perforant path inputs arrive 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference3. 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference4 demonstrated that SOM-expressing interneurons in the dentate gyrus display facilitating excitatory synaptic inputs — a property shared with neocortical Martino...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference5 In the dentate gyrus, HIPP cells represent the SST subtype analogous to O-LM cells, with somata in the hilus and axonal projections targeting the outer molecular layer where perforant path inputs arrive 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference6. 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference7 demonstrated that SOM-expressing interneurons in the dentate gyrus display facilitating excitatory synaptic inputs — a property shared with neocortical Martino...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference8 In the dentate gyrus, HIPP cells represent the SST subtype analogous to O-LM cells, with somata in the hilus and axonal projections targeting the outer molecular layer where perforant path inputs arrive 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference9. 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference0 demonstrated that SOM-expressing interneurons in the dentate gyrus display facilitating excitatory synaptic inputs — a property shared with neocortical Martino...

  • 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference1 The most striking functional distinction between hippocampal SST subtypes emerges during network oscillations. The landmark juxtacellular recording studies of Klausberger, Somogyi, and colleagues established that O-LM and bistratified cells fire at distinct phases of the theta rhythm and show opposing modulation during sharp-wave ripples (SWRs) 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference2. This work, conducted primarily in anesthetized and head-...

  • 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference3 The precise theta phase at which O-LM cells fire is reported inconsistently across studies. it has been reported O-LM cells firing preferentially at the trough of theta recorded in stratum pyramidale, with suppression during SWRs — a pattern independently confirmed by 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference4 using juxtacellular recordings of identified dendrite-targeting interneurons in rat CA1. However, it was found that the behavioral stat...

  • 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference5 The divergent oscillatory profiles of O-LM and bistratified cells are summarized in {numref}fig-sec9-olm-vs-bistratified. During theta oscillations, both subtypes are phase-locked but with different preferred phases and coupling strengths 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference6. The most dramatic divergence occurs during SWRs: it has been shown that during hippocampal network state transitions from theta to sharp-wave ripple, inhibition i...

  • 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference7 Qualitative comparison of O-LM and bistratified cell activity across hippocampal network states and oscillation coupling profiles. (a) Relative firing rates during theta oscillations, sharp-wave ripples, and quiet wakefulness/sleep, synthesized from juxtacellular recording studies in rat CA1. (b) Coupling strength to theta, slow gamma, fast gamma, and SWR events 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference8. Metric definitions vary...

  • 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference9 Qualitative comparison of O-LM and bistratified cell activity across hippocampal network states and oscillation coupling profiles. (a) Relative firing rates during theta oscillations, sharp-wave ripples, and quiet wakefulness/sleep, synthesized from juxtacellular recording studies in rat CA1. (b) Coupling strength to theta, slow gamma, fast gamma, and SWR events 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference0. Metric definitions vary...

  • 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference1 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference2 extended this picture to gamma-frequency oscillations, demonstrating layer-specific GABAergic control of distinct gamma oscillations in CA1: SST+ dendrite-targeting cells contributed to slow gamma while PV+ perisomatic-targeting cells drove fast gamma 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference3. This frequency-band segregation between subtypes has computational implications explored in {ref}sec-oscillatory-dynamics. Computati...

  • 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference4 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference5 extended this picture to gamma-frequency oscillations, demonstrating layer-specific GABAergic control of distinct gamma oscillations in CA1: SST+ dendrite-targeting cells contributed to slow gamma while PV+ perisomatic-targeting cells drove fast gamma 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference6. This frequency-band segregation between subtypes has computational implications explored in {ref}sec-oscillatory-dynamics. Computati...

  • 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference7 The laminar specificity of hippocampal SST subtypes positions them as potential gatekeepers of information flow between hippocampal subregions. Computational models first proposed this idea: 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference8 modeled the CA1 microcircuit and found that O-LM cell activation favors retrieval by suppressing entorhinal cortex input to distal dendrites while allowing CA3-driven recall through proximal dendrites [Cutsuridi...

  • 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference9 The laminar specificity of hippocampal SST subtypes positions them as potential gatekeepers of information flow between hippocampal subregions. Computational models first proposed this idea: 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference0 modeled the CA1 microcircuit and found that O-LM cell activation favors retrieval by suppressing entorhinal cortex input to distal dendrites while allowing CA3-driven recall through proximal dendrites [Cutsuridi...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference1 The laminar specificity of hippocampal SST subtypes positions them as potential gatekeepers of information flow between hippocampal subregions. Computational models first proposed this idea: 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference2 modeled the CA1 microcircuit and found that O-LM cell activation favors retrieval by suppressing entorhinal cortex input to distal dendrites while allowing CA3-driven recall through proximal dendrites [Cutsuridi...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference3 The laminar specificity of hippocampal SST subtypes positions them as potential gatekeepers of information flow between hippocampal subregions. Computational models first proposed this idea: 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference4 modeled the CA1 microcircuit and found that O-LM cell activation favors retrieval by suppressing entorhinal cortex input to distal dendrites while allowing CA3-driven recall through proximal dendrites [Cutsuridi...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference5 The gating function extends beyond the hippocampal formation proper. 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference6 showed that discrete hippocampal output projections are differentially regulated by PV and SST interneurons, with SST interneuron activity selectively modulating specific projection pathways 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference7. 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference8 demonstrated that frontal cortex SST interneurons gate hippocampal inputs in a learning-dependent manner, revealing cross-...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference9 The gating function extends beyond the hippocampal formation proper. 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference0 showed that discrete hippocampal output projections are differentially regulated by PV and SST interneurons, with SST interneuron activity selectively modulating specific projection pathways 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference1. 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference2 demonstrated that frontal cortex SST interneurons gate hippocampal inputs in a learning-dependent manner, revealing cross-...

  • 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference3 The gating function extends beyond the hippocampal formation proper. 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference4 showed that discrete hippocampal output projections are differentially regulated by PV and SST interneurons, with SST interneuron activity selectively modulating specific projection pathways 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference5. 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference6 demonstrated that frontal cortex SST interneurons gate hippocampal inputs in a learning-dependent manner, revealing cross-...

  • 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference7 The gating function extends beyond the hippocampal formation proper. 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference8 showed that discrete hippocampal output projections are differentially regulated by PV and SST interneurons, with SST interneuron activity selectively modulating specific projection pathways 2Citationpaper:paper-6cdec9b9ae1dHippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...content/09_hippocampal_sst.md:line 5Open reference9. 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference00 demonstrated that frontal cortex SST interneurons gate hippocampal inputs in a learning-dependent manner, revealing cross-...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference01 The most robust evidence for hippocampal SST function in behavior comes from memory paradigms. 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference02 demonstrated that aversive stimuli activate CA1 dendrite-targeting (SOM+) interneurons via cholinergic input, leading to inhibition of pyramidal cell distal dendrites receiving aversive sensory excitation from the entorhinal cortex 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference03. Inactivating these dendrite-targeting interneurons du...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference04 The most robust evidence for hippocampal SST function in behavior comes from memory paradigms. 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference05 demonstrated that aversive stimuli activate CA1 dendrite-targeting (SOM+) interneurons via cholinergic input, leading to inhibition of pyramidal cell distal dendrites receiving aversive sensory excitation from the entorhinal cortex 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference06. Inactivating these dendrite-targeting interneurons du...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference07 Subsequent studies expanded the behavioral repertoire. 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference08 showed that mTORC1 activity in hippocampal SST interneurons bidirectionally regulates contextual fear and spatial memory consolidation — upregulation of mTORC1 enhances memory while downregulation impairs it 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference09. This bidirectional modulation through a molecular signaling pathway provides mechanistic depth beyond the acute silencing par...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference10 Subsequent studies expanded the behavioral repertoire. 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference11 showed that mTORC1 activity in hippocampal SST interneurons bidirectionally regulates contextual fear and spatial memory consolidation — upregulation of mTORC1 enhances memory while downregulation impairs it 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference12. This bidirectional modulation through a molecular signaling pathway provides mechanistic depth beyond the acute silencing par...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference13 Subsequent studies expanded the behavioral repertoire. 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference14 showed that mTORC1 activity in hippocampal SST interneurons bidirectionally regulates contextual fear and spatial memory consolidation — upregulation of mTORC1 enhances memory while downregulation impairs it 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference15. This bidirectional modulation through a molecular signaling pathway provides mechanistic depth beyond the acute silencing par...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference16 Subsequent studies expanded the behavioral repertoire. 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference17 showed that mTORC1 activity in hippocampal SST interneurons bidirectionally regulates contextual fear and spatial memory consolidation — upregulation of mTORC1 enhances memory while downregulation impairs it 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference18. This bidirectional modulation through a molecular signaling pathway provides mechanistic depth beyond the acute silencing par...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference19 Subsequent studies expanded the behavioral repertoire. 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference20 showed that mTORC1 activity in hippocampal SST interneurons bidirectionally regulates contextual fear and spatial memory consolidation — upregulation of mTORC1 enhances memory while downregulation impairs it 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference21. This bidirectional modulation through a molecular signaling pathway provides mechanistic depth beyond the acute silencing par...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference22 Subsequent studies expanded the behavioral repertoire. 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference23 showed that mTORC1 activity in hippocampal SST interneurons bidirectionally regulates contextual fear and spatial memory consolidation — upregulation of mTORC1 enhances memory while downregulation impairs it 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference24. This bidirectional modulation through a molecular signaling pathway provides mechanistic depth beyond the acute silencing par...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference25 The relationship between SST inhibition and memory recall, however, introduces apparent paradoxes. 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference26 demonstrated that when fear was associated with inhibition of hippocampal SST interneurons, re-inhibition of the same interneurons could recall fear memory — suggesting that the pattern of SST activity during encoding becomes part of the memory trace itself, and reactivating that pattern is sufficient for r...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference27 The relationship between SST inhibition and memory recall, however, introduces apparent paradoxes. 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference28 demonstrated that when fear was associated with inhibition of hippocampal SST interneurons, re-inhibition of the same interneurons could recall fear memory — suggesting that the pattern of SST activity during encoding becomes part of the memory trace itself, and reactivating that pattern is sufficient for r...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference29 The relationship between SST inhibition and memory recall, however, introduces apparent paradoxes. 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference30 demonstrated that when fear was associated with inhibition of hippocampal SST interneurons, re-inhibition of the same interneurons could recall fear memory — suggesting that the pattern of SST activity during encoding becomes part of the memory trace itself, and reactivating that pattern is sufficient for r...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference31 The relationship between SST inhibition and memory recall, however, introduces apparent paradoxes. 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference32 demonstrated that when fear was associated with inhibition of hippocampal SST interneurons, re-inhibition of the same interneurons could recall fear memory — suggesting that the pattern of SST activity during encoding becomes part of the memory trace itself, and reactivating that pattern is sufficient for r...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference33 Effects of hippocampal SST interneuron manipulation on memory across five studies employing different behavioral paradigms and manipulation methods 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference34. Direction indicates qualitative effect (impairment versus enhancement); magnitude is not comparable across studies. Marker shape and color encode replication status: diamond (independently replicated...

  • 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference35 Effects of hippocampal SST interneuron manipulation on memory across five studies employing different behavioral paradigms and manipulation methods 1Citationpaper:paper-ad1611a9283aThe preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}sec-synaptic-connectivity). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...content/09_hippocampal_sst.md:line 3Open reference36. Direction indicates qualitative effect (impairment versus enhancement); magnitude is not comparable across studies. Marker shape and color encode replication status: diamond (independently replicated...

  • ... 87 additional anchors in refs_json

References

  1. [Pelkey2017] paper:paper-ad1611a9283a “The preceding sections established that neocortical SST interneurons operate within a feedforward and feedback cortical architecture, where Martinotti cells provide dendritic inhibition to pyramidal neurons across layers ({ref}`sec-synaptic-connectivity`). The hippocampal formation, however, presents a fundamentally different circuit organization — a trisynaptic loop with laminated inputs arriving at distinct dendri...”
  2. [Tricoire2011] paper:paper-6cdec9b9ae1d “Hippocampal SST interneurons encompass several morphologically and functionally distinct populations, most prominently oriens-lacunosum moleculare (O-LM) cells, bistratified cells, and hilar perforant path-associated (HIPP) cells in the dentate gyrus [Pelkey2017, Tricoire2011]. These subtypes share somatostatin expression and medial ganglionic eminence (MGE) developmental origin [Tricoire2011] but diverge sharply in...”
  3. [Katona1999] paper:paper-de14fd3d41ad “The defining feature that distinguishes hippocampal SST subtypes from one another — and from their neocortical counterparts — is the precision of their dendritic domain targeting ({ref}`sec-morphological-diversity`). Electron microscopy studies established that SST-immunoreactive axon terminals in the rat hippocampus preferentially contact dendrites of pyramidal cells, with approximately 76% of postsynaptic targets...”
  4. [MAller2014] paper:paper-ffdd928a6c0b “O-LM cells, with somata in stratum oriens and axons ascending to stratum lacunosum-moleculare, selectively inhibit the distal dendritic tufts where entorhinal cortex inputs arrive [MAller2014, Pelkey2017]. Bistratified cells, by contrast, ramify their axons across strata radiatum and oriens, targeting the proximal and basal dendritic domains that receive Schaffer collateral input from CA3 [MAller2014, Baude2007]. Th...”
  5. [Baude2007] paper:paper-a78fc56d9127 “O-LM cells, with somata in stratum oriens and axons ascending to stratum lacunosum-moleculare, selectively inhibit the distal dendritic tufts where entorhinal cortex inputs arrive [MAller2014, Pelkey2017]. Bistratified cells, by contrast, ramify their axons across strata radiatum and oriens, targeting the proximal and basal dendritic domains that receive Schaffer collateral input from CA3 [MAller2014, Baude2007]. Th...”
  6. [Chamberland2024] paper:paper-cf171ce288a9 “Recent work using intersectional genetic strategies has refined this picture further. [Chamberland2024] employed Sst;;Tac1 and Ndnf;;Nkx2-1 intersectional lines in mouse CA1 to dissect SST interneuron subtypes with unprecedented specificity. Sst;;Tac1 bistratified interneurons generated 85% of the inhibitory postsynaptic currents (IPSCs) recorded in CA1 pyramidal cells upon optogenetic stimulation of the general SST...”
  7. [Takacs2024] paper:paper-61c3969e3c57 “Complementing these cell-type-specific studies, [Takacs2024] characterized the synaptic and dendritic architecture across hippocampal SST subtypes, estimating that an individual hippocampal SST interneuron receives approximately 15,600 synaptic inputs, of which roughly 16% are GABAergic [Takacs2024]. The input pathway selectivity of O-LM cells was further dissected by [Bell2021], who found that the medial entorhinal...”
  8. [Bell2021] paper:paper-bec9f93b6eaf “Complementing these cell-type-specific studies, [Takacs2024] characterized the synaptic and dendritic architecture across hippocampal SST subtypes, estimating that an individual hippocampal SST interneuron receives approximately 15,600 synaptic inputs, of which roughly 16% are GABAergic [Takacs2024]. The input pathway selectivity of O-LM cells was further dissected by [Bell2021], who found that the medial entorhinal...”
  9. [Savanthrapadian2014] paper:paper-38f5d2327709 “In the dentate gyrus, HIPP cells represent the SST subtype analogous to O-LM cells, with somata in the hilus and axonal projections targeting the outer molecular layer where perforant path inputs arrive [Savanthrapadian2014, Raven2025b]. [Savanthrapadian2014] demonstrated that SOM-expressing interneurons in the dentate gyrus display facilitating excitatory synaptic inputs — a property shared with neocortical Martino...”
  10. [Raven2025b] paper:paper-1a5364762b62 “In the dentate gyrus, HIPP cells represent the SST subtype analogous to O-LM cells, with somata in the hilus and axonal projections targeting the outer molecular layer where perforant path inputs arrive [Savanthrapadian2014, Raven2025b]. [Savanthrapadian2014] demonstrated that SOM-expressing interneurons in the dentate gyrus display facilitating excitatory synaptic inputs — a property shared with neocortical Martino...”
  11. [Johantges2025] paper:paper-4526857e4904 “In the dentate gyrus, HIPP cells represent the SST subtype analogous to O-LM cells, with somata in the hilus and axonal projections targeting the outer molecular layer where perforant path inputs arrive [Savanthrapadian2014, Raven2025b]. [Savanthrapadian2014] demonstrated that SOM-expressing interneurons in the dentate gyrus display facilitating excitatory synaptic inputs — a property shared with neocortical Martino...”
  12. [Hartwich2009] paper:paper-2c384933256d “The most striking functional distinction between hippocampal SST subtypes emerges during network oscillations. The landmark juxtacellular recording studies of Klausberger, Somogyi, and colleagues established that O-LM and bistratified cells fire at distinct phases of the theta rhythm and show opposing modulation during sharp-wave ripples (SWRs) [Hartwich2009]. This work, conducted primarily in anesthetized and head-...”
  13. [Lasztoczi2014] paper:paper-059d84493087 “Qualitative comparison of O-LM and bistratified cell activity across hippocampal network states and oscillation coupling profiles. (a) Relative firing rates during theta oscillations, sharp-wave ripples, and quiet wakefulness/sleep, synthesized from juxtacellular recording studies in rat CA1. (b) Coupling strength to theta, slow gamma, fast gamma, and SWR events [Hartwich2009, Lasztoczi2014]. Metric definitions vary...”
  14. [Cutsuridis2010] paper:paper-07828f662237 “The laminar specificity of hippocampal SST subtypes positions them as potential gatekeepers of information flow between hippocampal subregions. Computational models first proposed this idea: [Cutsuridis2010] modeled the CA1 microcircuit and found that O-LM cell activation favors retrieval by suppressing entorhinal cortex input to distal dendrites while allowing CA3-driven recall through proximal dendrites [Cutsuridi...”
  15. [AeryJones2021] paper:paper-6033afc53a97 “The laminar specificity of hippocampal SST subtypes positions them as potential gatekeepers of information flow between hippocampal subregions. Computational models first proposed this idea: [Cutsuridis2010] modeled the CA1 microcircuit and found that O-LM cell activation favors retrieval by suppressing entorhinal cortex input to distal dendrites while allowing CA3-driven recall through proximal dendrites [Cutsuridi...”
  16. [Lodge2023] paper:paper-09da67359ac2 “The gating function extends beyond the hippocampal formation proper. [Lodge2023] showed that discrete hippocampal output projections are differentially regulated by PV and SST interneurons, with SST interneuron activity selectively modulating specific projection pathways [Lodge2023]. [Zhang2024] demonstrated that frontal cortex SST interneurons gate hippocampal inputs in a learning-dependent manner, revealing cross-...”
  17. [Zhang2024] paper:paper-5ab87d9bdbb3 “The gating function extends beyond the hippocampal formation proper. [Lodge2023] showed that discrete hippocampal output projections are differentially regulated by PV and SST interneurons, with SST interneuron activity selectively modulating specific projection pathways [Lodge2023]. [Zhang2024] demonstrated that frontal cortex SST interneurons gate hippocampal inputs in a learning-dependent manner, revealing cross-...”
  18. [LovettBarron2014] paper:paper-e9f2f58c35e6 “The most robust evidence for hippocampal SST function in behavior comes from memory paradigms. [LovettBarron2014] demonstrated that aversive stimuli activate CA1 dendrite-targeting (SOM+) interneurons via cholinergic input, leading to inhibition of pyramidal cell distal dendrites receiving aversive sensory excitation from the entorhinal cortex [LovettBarron2014]. Inactivating these dendrite-targeting interneurons du...”
  19. [Artinian2019] paper:paper-83a127a233c8 “Subsequent studies expanded the behavioral repertoire. [Artinian2019] showed that mTORC1 activity in hippocampal SST interneurons bidirectionally regulates contextual fear and spatial memory consolidation — upregulation of mTORC1 enhances memory while downregulation impairs it [Artinian2019]. This bidirectional modulation through a molecular signaling pathway provides mechanistic depth beyond the acute silencing par...”
  20. [Honore2022] paper:paper-f2511e36008f “Subsequent studies expanded the behavioral repertoire. [Artinian2019] showed that mTORC1 activity in hippocampal SST interneurons bidirectionally regulates contextual fear and spatial memory consolidation — upregulation of mTORC1 enhances memory while downregulation impairs it [Artinian2019]. This bidirectional modulation through a molecular signaling pathway provides mechanistic depth beyond the acute silencing par...”
  21. [Honore2021] paper:paper-f2a6c6c06b5a “Subsequent studies expanded the behavioral repertoire. [Artinian2019] showed that mTORC1 activity in hippocampal SST interneurons bidirectionally regulates contextual fear and spatial memory consolidation — upregulation of mTORC1 enhances memory while downregulation impairs it [Artinian2019]. This bidirectional modulation through a molecular signaling pathway provides mechanistic depth beyond the acute silencing par...”
  22. [Zicho2023] paper:paper-0c759b28e7ed “The relationship between SST inhibition and memory recall, however, introduces apparent paradoxes. [Zicho2023] demonstrated that when fear was associated with inhibition of hippocampal SST interneurons, re-inhibition of the same interneurons could recall fear memory — suggesting that the pattern of SST activity during encoding becomes part of the memory trace itself, and reactivating that pattern is sufficient for r...”
  23. [Lacagnina2024] paper:paper-1470e4598e32 “The relationship between SST inhibition and memory recall, however, introduces apparent paradoxes. [Zicho2023] demonstrated that when fear was associated with inhibition of hippocampal SST interneurons, re-inhibition of the same interneurons could recall fear memory — suggesting that the pattern of SST activity during encoding becomes part of the memory trace itself, and reactivating that pattern is sufficient for r...”

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