[The neuronal activity of the cat motor cortex during the differentiation between the reactions of placing support on the right and left paws acquired by stimulation of the parietal cortex of either hemisphere].

Cats were simultaneously trained to differentiate two conditioned reflexes: conditions placing of the right and the left forepaws electrical stimulation of the ipsilateral parietal cortices (area 5) serving as a conditioned stimulus (the right and the left areas correspondingly). Single unit responses of the shortest latencies in the motor cortex did not depend upon the cases whether parietal stimulation evoked placing or did not. Excitatory single unit responses occurring within 20-200 ms latency period from the stimulation onset were observed to be present only if the placing reaction was performed on the side controlled by the motor cortex of the given hemisphere. In the absence of conditioned placing after satiation of an animal or if the conditioned placing was performed by the other forepaw these excitatory responses were replaced by inhibitory pauses within the same time limits.