Retrograde amnesic effect of supramaximal electroconvulsive shock on one-trial acquisition in rats

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Effect of acquisition-electroconvulsive shock (ECS) interval on retrograde amnesia (RA) was investigated in 187 rats by means of the 1-trial learning technique of Pearlman, Sharpless, and Jarvik (1961), in replication of a small-sample study by Heriot and Coleman (1962). Previous results, in support of the memory consolidation by hypothesis, were substantiated. Significant RA was observed only when acquisition-ECS interval was 40 min. or less. At supramaximal ECS intensity used, Ss failing to exhibit hindlimb tonic extension did not exhibit low RA scores. On the contrary, in certain acquisition-ECS intervals such Ss yielded unusually high RA scores. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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