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The grooming behavior induced by intracerebroventricular administration of ACTH was specifically antagonized by the muscarinic receptor antagonists, atropine and scopolamine. The antagonism occurred in a dose-dependent manner with an ED50 of 0.2 mg/kg (i.p.) for atropine, and 0.03 mg/kg (i.p.) for scopolamine. Neither methylscopolamine nor methylatropine,(More)
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