Loss of behavioral thermoregulation after lateral hypothalamic lesions in rats.

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Abstract
Studied the behavior of 7 female albino rats with lateral hypothalamic lesions and 3 sham-operated controls. Lesioned ss ceased to press a bar to turn on a heat lamp in the cold, build nests, or bar-press to avoid shock. These deficits were not necessarily accompanied by adipsia and aphagia. Eventually, most ss returned to preoperative response levels. No impairment in physiological thermoregulation was seen in most ss. These results are contrasted with the effect of preoptic lesions, where ss are unable to maintain their temperature physiologically but bar-press for heat much more than normals. Results are interpreted in terms of motivational and sensory deficits after lateral hypothalamic lesions. (20 ref.) (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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