Abstract

Responses of neurons without spontaneous activity ("silent") to prolonged stimulation of the mesenteric nerves were studied in cats anesthetized with chloralose (65–70 mg/kg) and immobilized with flaxedil. The results showed that neurons of the association and primary projection areas are characterized by habituation to prolonged stimulation of visceral nerves. The rate of development of habituation depends on the parameters of stimulation and on the cortical region studied. Habituation developed more rapidly in the association area and was slower to develop at the focus of maximal activity of the second somatosensory area. The special features of cortical habituation during visceral stimulation are discussed.

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