MultiSLM multiphoton holography with red-shifted ChRmine in mouse V1 showed tha…

MultiSLM multiphoton holography with red-shifted ChRmine in mouse V1 showed that stimulating a small but critical number of orientation-selective neurons in layer 2/3 or layer 5 elicited correct orientation-discrimination behavior, with smaller layer-5 ensembles as effective as larger layer-2/3 ensembles — direct optogenetic causal evidence for layer-asymmetric ensemble dynamics in mouse cortex.

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  "doi": "10.1126/science.aaw5202",
  "claim": "MultiSLM multiphoton holography with red-shifted ChRmine in mouse V1 showed that stimulating a small but critical number of orientation-selective neurons in layer 2/3 or layer 5 elicited correct orientation-discrimination behavior, with smaller layer-5 ensembles as effective as larger layer-2/3 ensembles — direct optogenetic causal evidence for layer-asymmetric ensemble dynamics in mouse cortex.",
  "cite_key": "Marshel2019",
  "evidence": "MultiSLM holography + ChRmine; layer-asymmetric ensemble dynamics; smaller L5 ensembles match larger L2/3 ensembles for behavioral readout.",
  "effect_size": "smaller layer-5 ensembles as behaviorally effective as larger layer-2/3 ensembles; recruitment threshold ~ critical number",
  "text_access": "abstract_only",
  "study_system": "Awake mouse V1, all-optical (MultiSLM + ChRmine + 2P imaging)",
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  "claim_source_sentence": "Stimulating a critical number of stimulus-orientation-selective neurons drove widespread recruitment of functionally related neurons, a process enhanced by (but not requiring) orientation-discrimination task learning. Optogenetic targeting of orientation-selective ensembles elicited correct behavioral discrimination.",
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  "effect_size_source_sentence": "smaller layer 5 ensembles were as effective as larger layer 2/3 ensembles in eliciting orientation discrimination behavior."
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Stimulating a critical number of stimulus-orientation-selective neurons drove widespread recruitment of functionally related neurons, a process enhanced by (but not requiring) orientation-discrimination task learning. Optogenetic targeting of orientation-selective ensembles elicited correct behavioral discrimination.

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