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3. Contextual fear conditioning and memory test. A) Conditioning: HPC rats exhibited less freezing than SHAM rats on trial 2 and 3. B) Retention: HPC and SHAM rats performed similarly on the context memory tests at 1, 7, and 15-d retention intervals. Note that all statistically significant between-group differences are indicated (**).
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We examine the maintenance and behavioural expression of long-term memories acquired in the absence of the hippocampus. The hypothesis that the hippocampus is necessary to form stable and detailed long-term memories is tested. We find rats with extensive hippocampal damage made before learning exhibit normal maintenance and behavioural expression o...
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