Dissociation between learning and remembering in rats with lesions in the lateral hypothalamus

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10 female Sprague-Dawley albino rats which had recovered regulatory feeding after lesions in the lateral hypothalamus (LH) were tested for retention of a taste aversion acquired prior to the lesions. All 10 Ss retained the aversion. 2 of these Ss provided evidence that preoperative memory can be lost following lesions but subsequently recovers. The same 10 recovered LH-lesioned Ss were exposed to a taste-aversion training procedure identical to that used prior to the lesion, but with novel flavors. 7 of the 10 failed to acquire the new taste aversion. 3 additional Ss served as unoperated controls. It is concluded that rats with lateral hypothalamic damage are thus capable of remembering previously learned taste aversions but unable to learn new ones. (17 ref) (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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