Effect of adrenal demedullation on an avoidance response in the rat

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“Thirty male, hooded, littermate rats were … taught to avoid shock by running to a small goal box off the corner of a shock alley …. The Ss were given 40 trials a day until they met the criterion of successfully avoiding shock for 30 successive trials …. A bilateral adrenal demedullation was performed on Group I. A sham operation was performed on Group II, and Group III served as a nonoperated control …. The group means do not differ significantly on either … [number of trials to criterion or number of shocks received during training]. Thus, the hypothesis that a bilateral adrenal demedullation will interfere with the acquisition of an avoidance response is not supported.” From Psyc Abstracts 36:01:1DJ15M. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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