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  • Title: Long gradient of retrograde amnesia in mice: continuity with the findings in humans.
    Author: Squire LR, Spanis CW.
    Journal: Behav Neurosci; 1984 Apr; 98(2):345-8. PubMed ID: 6539119.
    Abstract:
    Mice were given a single training trial and then received either sham treatment or electroconvulsive shock (ECS; four treatments at hourly intervals) at 1 of 7 times (1-70 days) after training. Retention was always tested 2 weeks after treatment. Control animals exhibited gradual forgetting with increasing retention intervals. Mice given ECS exhibited severe retrograde amnesia, which diminished as the interval between training and ECS increased from 1 to 21 days. ECS given 21-70 days after training had no effect on memory. The finding of long, temporally graded retrograde amnesia in mice establishes continuity between the results for laboratory animals and those for humans and indicates that the neural changes involved in the consolidation of memory can continue for a significant portion of the lifetime of a memory.
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