OLM Cell Contribution to Hippocampal Theta Oscillations

Converging evidence across experimental and computational approaches for OLM (SST) cells' role in hippocampal theta rhythm. Shows the range of evidence from peptide modulation of septal theta circuits to computational predictions of OLM necessity.

{
  "papers": [
    {
      "doi": "10.1523/JNEUROSCI.4619-04.2005",
      "value": "SST and octreotide reduce theta power via sst2A receptors on septal GABAergic neurons",
      "method": "in vivo pharmacology + juxtacellular recording",
      "metric": "Effect of SST on hippocampal theta power",
      "cite_key": "Bassant2005",
      "condition": "freely moving rat",
      "study_system": "rat",
      "value_source_sentence": "intraseptal injections of OCT and SST in freely moving rats reduced the power of hippocampal EEG in the theta band"
    },
    {
      "doi": "10.1038/nn.3235",
      "value": "OLM activation facilitates CA3 inputs while reducing EC inputs",
      "method": "optogenetics + electrophysiology",
      "metric": "OLM cell gating of CA3 vs EC inputs",
      "cite_key": "Leao2012",
      "condition": "in vitro and in vivo hippocampus",
      "study_system": "mouse",
      "value_source_sentence": "OLM cells have a key role in gating the information flow in CA1, facilitating the transmission of intrahippocampal information (from CA3) while reducing the influence of extrahippocampal inputs"
    },
    {
      "doi": "10.7554/elife.87356",
      "value": "OLM cells critical for theta rhythm generation in circuit model",
      "method": "dynamical computational model",
      "metric": "Computational prediction of OLM role in theta",
      "cite_key": "Vardalakis2024",
      "condition": "hippocampal circuit simulation",
      "study_system": "computational model",
      "value_source_sentence": "A dynamical computational model of theta generation in hippocampal circuits to study the role of somatostatin-expressing cells"
    },
    {
      "doi": "10.7554/elife.18566",
      "value": "OLM cells set theta amplitude and frequency via dendritic inhibition",
      "method": "full-scale hippocampal CA1 circuit model",
      "metric": "Full-scale model prediction of OLM contribution",
      "cite_key": "Bezaire2016",
      "condition": "biophysical simulation",
      "study_system": "computational model",
      "value_source_sentence": "Interneuronal mechanisms of hippocampal theta oscillations in a full-scale model of the rodent CA1 circuit"
    }
  ],
  "comparison_id": "olm-cell-theta-contribution",
  "comparison_name": "OLM Cell Contribution to Hippocampal Theta Oscillations",
  "comparison_type": "convergent evidence",
  "what_it_reveals": "Converging evidence across experimental and computational approaches for OLM (SST) cells' role in hippocampal theta rhythm. Shows the range of evidence from peptide modulation of septal theta circuits to computational predictions of OLM necessity.",
  "homogeneity_check": {
    "caveats": [
      "Mix of experimental and computational approaches",
      "Species differ (rat vs mouse vs simulation)",
      "Interventions differ (pharmacological, optogenetic, computational)",
      "Not directly comparable quantitatively but converge on OLM theta role"
    ],
    "comparable": false
  },
  "suggested_plot_type": "timeline"
}

[
  "paper:paper-55cbe4ea675f",
  "paper:paper-58e9433d27d5",
  "paper:paper-a44420657679",
  "paper:paper-dd99747d4e78"
]

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  "notes": [
    "Local review repositories are read-only inputs.",
    "SciDEX stores paper metadata, structured evidence, file pointers, and short citation contexts; it does not copy full review prose."
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  "source_commit_sha": "89b7e9787cd90e942b0adb531d549af3ddad30f1",
  "source_repository_url": "https://github.com/AllenNeuralDynamics/ComputationalReviewSST"
}