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The aims of the present study were (1) to determine whether selective lesions of the accumbens cholinergic interneurons impair feeding and body weight regulation, and (2) to characterize the nature of disturbances using motivational and metabolic challenges. Rats with bilateral cholinotoxic (AF64A) lesions in the nucleus accumbens showed a significant and lasting lag in body weight gain in comparison...
Extracellular levels of acetylcholine (ACh) were measured in the central nucleus of the amygdala using microdialysis in 20-min intervals before, during, and after 1 h feeding in food-deprived rats. The results were compared to the effects of peripheral injections of glucose or low (200 mU) and high (1 U) doses of insulin. Feeding caused a 40% increase in extracellular ACh in the amygdala...
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