Abstract
Responses of cortical neurons in the posterior sigmoid gyrus of cats anesthetized with chloralose to electrical stimulation of somatic and visceral nerves were recorded. Bimodal viscero-somatic neurons are predominant in this part of the cortex and some of them also respond to light. Besides the polysensory modally-specific neurons it was also possible to distinguish a group of modally nonspecific cells (27%), whose responses to different stimuli did not differ statistically from each other. Simultaneous stimulation of visceral and somatic nerves led to facilitation of activity of the long-latency neurons; this was reflected in a decrease of 10 msec in the latent period of the response and an increase in the number of spikes per discharge.
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