title: [Participation of neurons of the associative cerebral cortex in the formation of a conditioned defensive reflex].
abstract: Neuronal activity was recorded in the frontal lateral gyrus of waking unanesthetized cats in the process of defensive conditioning. It has been found that at the beginning of learning, the frequency of neuronal prestimulus impulse activity was the highest and the ratio of neurones with tonic excitatory responses to conditioned stimulus was maximal. In the course of reflex elaboration, the frequency of prestimulus neuronal discharges decreased, and tonic excitatory responses gave place to phasic ones. In consolidated reflexes, conditioned responses of neurones in the associative cortex were mainly inhibitory; the correlation of the discharges frequency of the neighbouring nerve cells increased comparatively with the beginning of learning.
mesh_terms: D000818:Animals; D001244:Association; D001362:Avoidance Learning / Q000502:physiology*; D001931:Brain Mapping; D002415:Cats; D002540:Cerebral Cortex / Q000502:physiology*; D003214:Conditioning, Classical / Q000502:physiology*; D004597:Electroshock; D005071:Evoked Potentials; D008027:Light; D013016:Sound
vernacular_title: Ob uchastii neĭronov assotsiativnoĭ kory bol'shogo mozga v formirovanii uslovnogo oboronitel'nogo refleksa.