[Responses of neurons in the secondary somatosensory zone of the cat cortex during elaboration of a defensive conditioned reflex].
The neuronal responses of the somatosensory secondary cortex during the process of formation and extinction of a conditioned defence reflex to sound stimulus were studied in chronic experimentss on cats. In 21 out of 28 examined neurons a change in activity took place during the formation of a conditioned reflex as a response to the conditional signal. Two types of conditioned reflex responses were observed: excitatory and inhibitory ones. Most of the neurons excited by the conditioned stimulus responded during the first 50 ms, preceding the conditioned movement by 80-100 ms. Significant variability of neuronal responses was observed during formation of the conditioned reflex. After stabilization the neuronal responses to the conditioned stimulus acquired a stable from. During extinction of the neuronal conditioned activity a decrease of the discharge frequency in the excitatory neuronal response and disinhibition of the activity in the inhibitory responses were found.
D000818:Animals; D002415:Cats; D003214:Conditioning, Classical / Q000502:physiology*; D004594:Electrophysiology; D005108:Extinction, Psychological / Q000502:physiology; D010146:Pain; D013003:Somatosensory Cortex / Q000502:physiology*; D013016:Sound
Reaktsii neĭronov vtorichnoĭ somato-sensornoĭ zony kory koshki pri vyrabotke oboronitel'nogo uslovnogo refleksa.