Abstract

Twenty rats with hippocampal lesions and 40 rats with control lesions were tested in a step-down passive avoidance situation. The step-down response was followed by a 35-mA ECS after 6.6 sec in one group and after 3.3 sec in another group, while a third group served as a footshock (FS) control. The results indicated that, although retention of the FS was an increasing function of the temporal interval between the FS and ECS for all groups, there were no differences between Ss with hippocampal lesions and controls at any ECS interval. The results were interpreted as suggesting that the hippocampus is not involved in the consolidation process.

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