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. 2012 Dec 3;6:111. doi: 10.3389/fnint.2012.00111

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Copyright © 2012 Matthews, He, Buhusi and Buhusi.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in other forums, provided the original authors and source are credited and subject to any copyright notices concerning any third-party graphics etc.

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Long-lasting freezing behavior following the presentation of the auditory distracter in the FEAR, but not CTRL rats. Average percent freezing behavior (±SEM) in the fear conditioning context during freezing behavior testing and re-training sessions, before, during, and after the presentation of the noise (in extinction, no shock). Unlike CTRL rats, FEAR rats show reliable, long-lasting freezing behavior after, but not before the presentation of the noise. Empty symbols show time where emotional response (freezing behavior) did not differ reliably between FEAR and CTRL rats, p > 0.05. The gray bar indicates the presentation of the auditory distracter.