Effects of some rhinencephalic lesions on retention of conditioned avoidance behavior in cats.

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Abstract
In an investigation of rhinencephalic function, cats were taught a conditioned avoidance response (CAR) to an auditory CS in a double-grill shuttle box. Following separate, bilateral ablation of either cingulate cortex or septal region, or combined ablation of both septal region and hippocampal formation, retention of the CAR was impaired. Cortical control lesions did not affect CAR retention. As measured by ability to relearn the CAR, greatest impairment occurred with septal and combined septal-hippocampal lesions. Although some "septal" cats showed an irritability syndrome not unlike that seen in septal rats, this emotional disturbance was not correlated with the effect of septal ablation on the CAR.