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Psychosomatic Medicine 24:590-595 (1962)
© 1962 American Psychosomatic Society

Deleterious Effects of Anxiety Elicited by Conditioned Pre-aversive Stimuli in the Rat

JOHN PAUL BRADY M.D.1, DOUGLAS R. THORNTON B.S.1, and DUKE DE FISHER B.S.1

1 Institute of Psychiatric Research, Indiana University Medical Center, Indianapolis, Ind.

In the experiments reported the deleterious effects of the conditioned emotional response (anxiety) elicited by a pre-aversive stimulus (a buzzer) were separated from the deleterious effects of the aversive stimulus itself (an electric shock). This was accomplished by using three groups of animals. In the first group, shocks were often preceded by a buzzer (pre-aversive stimulus). The second group received the same quantity of shock but without pre-aversive stimuli. The third group received neither shock nor buzzer. Mortality and morbidity were greatest for the first group and least for the third. The experiment was repeated 4 times, varying various parameters of the experimental situation.

Submitted on January 24, 1962






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