Abstract
In a discriminated shock avoidance situation, rats offered a choice between water and ethanol increased their ethanol consumption significantly during acquisition of the avoidance response and when random unavoidable shock signaled by a warning light was simultaneously delivered. Control rats which received unsignaled random unavoidable shock during the avoidance sessions, and controls which received only signaled or unsignaled random unavoidable shock did not increase ethanol consumption. A trend toward increased levels of plasma corticosterone was found in the experimental rats over control animals. Weights of the thymus and adrenal glands did not differ significantly between the experimental and control groups. A relation was observed between ethanol consumption and changes in the stimulus conditions which required the acquisition of a new response.
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