Abstract
Noninjurious tail-pinch (TP) reportedly elicits eating behavior from rats rendered aphagic by lateral hypothalamic (LH) lesions. The present investigation showed that the therapeutic utility of TP is limited at best and depends upon lesion size and food palatability. Rats with small lesions ate more ordinary solid food (pellet) than did rats with large lesions, and both exhibited more eating behavior in the presence of palatable solid food (chocolate chip cookie) than ordinary solid food. However, neither LH group displayed a normal pattern of eating as opposed to the pattern exhibited by intact rats during TP treatment or following 25 hr of food deprivation. These findings bear implications for current concepts about restoration of eating behavior following LH damage.
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