[Responses of limbic cortex neurons in the cat during performance of an instrumental conditioned reflex].

Neuronal impulse activity in areas 24 and 32 was studied in cats during conditional placing. Activity of different neurons in the limbic cortex of trained cats correlated with acoustic stimuli, movement reactions and in some cases with reinforcement. Only 16% neurons of untrained animals responded to acoustic stimulations. After training the number of neurons responding to sound increased in area 32 to 51.3%. 34.6% of neurons responded by initial excitation and 26.7% by inhibition of impulse activity. Latencies of these responses were about 50 ms, their duration--up to 200 ms. Similar, but less noticeable responses were found in neurons of area 24. Short latency activation responses to conditional and differentional stimulations did not differ essentially. It is assumed that limbic cortex after conditioning can facilitate acceptability of both conditional and differential signals irrespective of their functional role.