Correlational relationship between shock intensity and corticosterone secretion on the establishment and subsequent expression of contextual fear conditioning

A role for corticosterone in the consolidation of contextual fear conditioning has previously been proposed. In this study, physiological evidence was found to support this view. The extent of conditioned fear and the levels of plasma corticosterone in rats, after context exposure at training and at different posttraining times (24 hr and 7 days), depended on the intensity of the unconditional stimulus (footshock). In each experimental session, a positive correlation was found between the magnitude of corticosterone levels and the fear-related behavioral inhibition exhibited in the context. Results support the involvement of corticosterone on the processes that occur during consolidation in determining the strength at which the contextual fear conditioning is stored as a long-term memory.


Published in:
Behav Neurosci, 112, 4, 885-91
Year:
1998
ISSN:
0735-7044
Keywords:
Note:
Author address: Department of Psychobiology, Universidad Nacional de Educacion a Distancia, Ciudad Universitaria, Madrid, Spain.
Laboratories:




 Record created 2007-01-18, last modified 2018-03-17


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