Abstract
To determine the specific effects of frontal ablations on emotional behavior, rats were given training in conditioned suppression of bar-pressing and the behavior syndrome of the conditioned emotional response (CER). Ss were then divided into three experimental groups for surgery: Group A (anterior areas of the frontal lobes ablated), Group L (lateral areas of the frontal lobes ablated) and Group S (sham-operated animals). Only the freezing component of the CER was affected by the surgical procedure, and this effect was limited to Group L. The data are interpreted as supporting the hypothesis that the hyperactivity resulting from some frontal ablations results in a decrement in some of the trained emotional responses.
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