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- Live5/17/2026, 4:35:28 PM
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{ "scope": "mouse primary motor cortex (M1) layer 5B PT and IT projection neurons", "claim_text": "In mouse motor cortex L5B, optogenetic retrograde rabies-virus-encoded ChR2 plus paired recording shows that within-class (recurrent) excitatory connections exist among corticospinal (PT) neurons and among callosally projecting corticostriatal (IT) neurons, but cross-class connectivity is extraordinarily asymmetric and essentially unidirectional from corticostriatal IT to corticospinal PT (IT→PT) — establishing the hierarchical IT→PT motif in mouse M1.", "raw_fields": { "n": 0, "doi": "10.1523/jneurosci.4759-11.2012", "claim": "In mouse motor cortex L5B, optogenetic retrograde rabies-virus-encoded ChR2 plus paired recording shows that within-class (recurrent) excitatory connections exist among corticospinal (PT) neurons and among callosally projecting corticostriatal (IT) neurons, but cross-class connectivity is extraordinarily asymmetric and essentially unidirectional from corticostriatal IT to corticospinal PT (IT→PT) — establishing the hierarchical IT→PT motif in mouse M1.", "cite_key": "Kiritani2012", "evidence": "Retrograde rabies-virus-delivered ChR2 in identified projection classes combined with paired patch-clamp recordings in mouse motor cortex slices.", "effect_size": "qualitative — asymmetric, essentially unidirectional IT→PT cross-class connectivity in L5B", "text_access": "abstract_only", "study_system": "mouse primary motor cortex (M1) layer 5B PT and IT projection neurons", "argument_role": "supporting", "replication_status": "independently_replicated", "claim_source_sentence": "Both corticospinal and callosally projecting corticostriatal neurons in layer 5B formed within-class (recurrent) connections, with higher connection probability among corticostriatal than among corticospinal neurons. In contrast, across-class connectivity was extraordinarily asymmetric, essentially unidirectional from corticostriatal to co", "source_provenance_status": "non_substring_match", "replication_evidence_dois": [ "10.1523/JNEUROSCI.4023-14.2015", "10.1523/JNEUROSCI.4287-14.2015" ], "effect_size_source_sentence": "across-class connectivity was extraordinarily asymmetric, essentially unidirectional from corticostriatal to co" }, "section_id": "section_07", "source_url": "https://github.com/AllenNeuralDynamics/ComputationalReviewRecurrence/blob/79ce062d54a924ce05953ec90aa9d26044d2b48f/evidence/section_07_evidence_package.json", "effect_size": "qualitative — asymmetric, essentially unidirectional IT→PT cross-class connectivity in L5B", "review_repo": "ComputationalReviewRecurrence", "section_ref": "wiki_page:computationalreviewrecurrence-07-celltype-motifs", "source_kind": "review_finding", "source_path": "evidence/section_07_evidence_package.json", "source_refs": [ "paper:paper-e1291622a820" ], "source_span": "Both corticospinal and callosally projecting corticostriatal neurons in layer 5B formed within-class (recurrent) connections, with higher connection probability among corticostriatal than among corticospinal neurons. In contrast, across-class connectivity was extraordinarily asymmetric, essentially unidirectional from corticostriatal to co", "study_system": "mouse primary motor cortex (M1) layer 5B PT and IT projection neurons", "evidence_refs": [ { "ref": "paper:paper-e1291622a820" } ], "section_title": "7. Cell-type-specific E→E motifs in mouse — IT vs PT vs CT pyramidal projection classes; L5 thick-tufted recurrence; Patch-seq and Allen mouse-cortex taxonomy intersections; transcriptomic-type-specific connectivity", "source_policy": { "mode": "public_source_pointer_with_short_context", "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." ], "source_commit_sha": "79ce062d54a924ce05953ec90aa9d26044d2b48f", "source_repository_url": "https://github.com/AllenNeuralDynamics/ComputationalReviewRecurrence" }, "evidence_summary": "Retrograde rabies-virus-delivered ChR2 in identified projection classes combined with paired patch-clamp recordings in mouse motor cortex slices.", "review_bundle_ref": "analysis_bundle:ab-d9c479db9be9", "replication_status": "independently_replicated", "review_package_ref": "analysis_bundle:ab-d9c479db9be9", "source_artifact_ref": "wiki_page:computationalreviewrecurrence-07-celltype-motifs", "origin_url": "https://github.com/AllenNeuralDynamics/ComputationalReviewRecurrence/blob/79ce062d54a924ce05953ec90aa9d26044d2b48f/evidence/section_07_evidence_package.json", "commit_sha": "79ce062d54a924ce05953ec90aa9d26044d2b48f", "created_by": "persona-jerome-lecoq-gbo-neuroscience", "repository_url": "https://github.com/AllenNeuralDynamics/ComputationalReviewRecurrence" }