Rats with cytotoxic ventral hippocampal lesions which removed approximately 50% of the hippocampus (including dentate gyrus) starting from the temporal pole, displayed a reduction in freezing behaviour following the delivery of an unsignalled footshock in an operant chamber. This was more plausibly a result of reduced susceptibility to fear than a result of a lesion-induced increase in general motor activity. There was no consistent difference between sham and lesioned animals in spontaneous ...Expand abstract
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Ventral hippocampal lesions affect anxiety but not spatial learning.
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