Retrograde amnesia for a passive avoidance task was produced in rats by electroconvulsive shock (ECS). However, if rats were left to recover for 15 min in the training apparatus after receiving a foot shock-ECS combination, they showed no sign of amnesia at testing 24-hr later. ECS alone without training had no effect on the step-out latencies. Amnesia did occur when the place of training was different from the place of recovery. The results suggest that a core memory survives ECS treatment and that this surviving trace is retrievable at the retest trial if continuity with the preceding experimental events is established upon recovery from the black-out produced by ECS.
- Passive avoidance
- Retrograde amnesia
ASJC Scopus subject areas
- Experimental and Cognitive Psychology
- Behavioral Neuroscience