Behavioral effects of orbital and proreal lesions in cats.

Abstract

Cats with lesions of the orbital gyrus were impaired in acquiring an active avoidance response and acquired a food-rewarded instrumental response more rapidly than cingulectomized or sham-operated controls, emitted more responses than controls during extinction, and, compared with controls, were more active and showed some deficiency in passive avoidance. Cats with lesions of gyrus proreus differed from controls only in the more rapid acquisition of a food-rewarded instrumental response. While most of the results are compatible with the hypothesis that Ss [subjects] with lesions of the orbital gyrus are deficient at response suppression, their active avoidance deficit cannot be explained in this way.