Abstract
The behavior of rats with chronic lesions of the head of the caudate-putamen or of the dorsomedial nucleus of the thalamus was examined in a variety of situations known to be sensitive to damage to the medial prefrontal or orbital prefrontal cortex of rats, respectively. Lesions of either structure produced behavioral changes that were similar to those previously observed following prefrontal removals. These changes included decreased food hoarding, altered social behavior, impaired learning of spatial reversals and increased resistance to extinction. The similarity in the effects of prefrontal, caudate, and dorsomedial thalamic lesions suggest that these structures are components of the same functional system(s).
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