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0898-929X
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4.69

Journal of Cognitive Neuroscience

Summer 1989, Vol. 1, No. 3, Pages 238-243
(doi: 10.1162/jocn.1989.1.3.238)
© 1989 by the Massachusetts Institute of Technology
Indelibility of Subcortical Emotional Memories
Article PDF (622.97 KB)
Abstract

Acquisition and extinction of fear responses conditioned to a visual stimulus were examined in rats with ablations of visual cortex. Visual cortex lesions did not interfere with acquisition, indicating that visual fear conditioning, like auditory fear conditioning, is mediated by sub-cortical, probably thalamo-amygdala, sensory pathways. In contrast to acquisition, extinction was greatly prolonged, if not prevented, by cortical ablation. This resistance to extinction of sub cortical emotional memories may explain certain aspects of emotional memory in man.