- claim_text
In mouse ALM layer 5 and barrel cortex S1, optogenetic stimulation of PV interneurons paradoxically reduces their activity (as expected for an inhibition-stabilized regime), but in ALM layer 2/3 it does not; two-population models cannot capture the layer-specific pattern, and four-population (PC, PV, SOM, VIP) models reproduce it only when recurrent excitation is not too strong — arguing that the paradoxical effect alone is not proof of inhibition-stabilization.
- raw_fields
{
"n": 0,
"doi": "10.7554/elife.49967",
"claim": "In mouse ALM layer 5 and barrel cortex S1, optogenetic stimulation of PV interneurons paradoxically reduces their activity (as expected for an inhibition-stabilized regime), but in ALM layer 2/3 it does not; two-population models cannot capture the layer-specific pattern, and four-population (PC, PV, SOM, VIP) models reproduce it only when recurrent excitation is not too strong — arguing that the paradoxical effect alone is not proof of inhibition-stabilization.",
"cite_key": "Mahrach2020",
"evidence": "Two-population models cannot explain the results. Four-population networks with V1-like architecture account for the data in ALM layer 2/3 and layer 5. In both four-population models, the paradoxical effect implies not too strong recurrent excitation. It is not evidence for stabilization by inhibition.",
"effect_size": "",
"text_access": "fulltext",
"study_system": "mouse ALM and S1 cortex; in vivo PV photostimulation with simultaneous PC/PV recordings and four-population network modeling",
"argument_role": "supporting",
"replication_status": "single_lab",
"claim_source_sentence": "In ALM layer five and S1, the PV response is paradoxical: photoexcitation reduces their activity. This is not the case in ALM layer 2/3.",
"source_provenance_status": "ok",
"replication_evidence_dois": [],
"effect_size_source_sentence": null
}- source_refs
[
"paper:paper-38fe71bdf9b6"
]
- evidence_refs
[
{
"ref": "paper:paper-38fe71bdf9b6"
}
]- 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
Two-population models cannot explain the results. Four-population networks with V1-like architecture account for the data in ALM layer 2/3 and layer 5. In both four-population models, the paradoxical effect implies not too strong recurrent excitation. It is not evidence for stabilization by inhibition.