期刊
BEHAVIORAL NEUROSCIENCE
卷 120, 期 4, 页码 873-879出版社
AMER PSYCHOLOGICAL ASSOC
DOI: 10.1037/0735-7044.120.4.873
关键词
context fear conditioning; immediate shock deficit; freezing; footshock; classical conditioning
资金
- NIMH NIH HHS [R01 MH62122] Funding Source: Medline
Pavlovian contextual fear conditioning occurs when an aversive unconditional stimulus (US), such as a footshock, is presented to a rat shortly after it is placed in an experimental context. Contextual fear conditioning does not occur when the shock is presented immediately upon placement of the rat in the novel chamber. In the present study, the authors report that increasing either the number of immediate shock sessions (Experiment 1) or the immediate shock duration (Experiment 2) did not reverse this deficit. However, immediate shock seems to sensitize subsequent context conditioning (Experiment 3). These findings suggest that the associative deficit produced by immediate shock is not related to the rat's ability to process the footshock US.
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