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Eur J Neurosci. 2008 Oct;28(8):1661-6. doi: 10.1111/j.1460-9568.2008.06485.x.

Pavlovian fear conditioning as a behavioral assay for hippocampus and amygdala function: cautions and caveats.

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Department of Psychology and Neuroscience Program, University of Michigan, Ann Arbor, MI 48109-1043, USA.


Pavlovian fear conditioning has become an important model for investigating the neural substrates of learning and memory in rats, mice and humans. The hippocampus and amygdala are widely believed to be essential for fear conditioning to contexts and discrete cues, respectively. Indeed, this parsing of function within the fear circuit has been used to leverage fear conditioning as a behavioral assay of hippocampal and amygdala function, particularly in transgenic mouse models. Recent work, however, blurs the anatomical segregation of cue and context conditioning and challenges the necessity for the hippocampus and amygdala in fear learning. Moreover, nonassociative factors may influence the performance of fear responses under a variety of conditions. Caution must therefore be exercised when using fear conditioning as a behavioral assay for hippocampal- and amygdala-dependent learning.

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