The effect of electroconvulsive shock (ECS) on a conditioned emotional response: the effect of post-ECS extinction on the reappearance of the response.

Abstract
When rats are given extinction trials following ECS treatment of a conditioned emotional response, there is a definite interference with the reappearance of the CER at a later date. It is concluded that ECS reduces the strength of the conditioned emotional response but does not completely eliminate it. Using a more refined definition of the conditioned emotional response it is shown that "a vestigial from of the CER survived ECS to occur in conjunction with the unreinforced conditioned stimulus during extinction." (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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