[Reorganization of changes in the receptive fields of cat visual cortex neurons during light anesthesia].
The activity of 127 neurones of the primary visual cortex (17th field) was recorded in unanaesthetized cats immobilized with d-tubocurarine, during calm alertness and during short sleep caused by intravenous administration of 5% water solution of sombrevine in a dose of 1.5 mg/kg. In all of the studied cells, considerable rearrangements in sizes and in form of the receptive fields (RF) were recorded. The studied neurones with excitatory RF centres formed two main groups. The first one comprised 52% of cells; the central excitatory zone of their RF became considerably wider due to administration of sombrevine. In the second group (48%), the drug produced a significant reduction of RF. Neurones with an inhibitory RF centre exhibited a different relation of RF changes: the RFs became larger in 68% and narrower in 32% of the studied cells. Cortical and reticular mechanisms are discussed of the observed rearrangements in the RFs of visual cortical neurones under the action of sombrevine--a general anaesthetic, provoking a short-term decrease in the brain functional state.
D000768:Anesthesia, General; D000818:Animals; D002415:Cats; D004594:Electrophysiology; D011410:Propanidid / Q000494:pharmacology; D014793:Visual Cortex / Q000187:drug effects / Q000502:physiology*; D014794:Visual Fields; D014796:Visual Perception / Q000187:drug effects / Q000502:physiology*
D011410:Propanidid
Perestroĭka izmeneniia retseptivnykh poleĭ neĭronov zritel'noĭ kory koshki vo vremia legkogo narkoticheskogo sna.