Abstract
The experiments were pertormed on three dogs. The extero- and interoceptive conditioned reflexes were studied before and after extirpating the vagal cortical areas. The extirpation caused a disturbance of coditioned reflexes associated with gastric stimulation, but had no effect on those which depended on stimulation of the intestine, which is innervated by the splanchnic nerve. A control operation, in which a portion of a parietal lobe was extirpated, was performed on one of the dogs, and caused no changes in the conditioned reflexes in which an association was made between stimulation of the extero- and interoceptors. Removal of the sensory vagal cortical centers in dogs in which the stomach had been denervated caused a prolonged and flucuating disturbance of the gastric interoceptive reflexes.
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