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. 2011 Mar 30;31(13):4991–4999. doi: 10.1523/JNEUROSCI.5216-10.2011

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Copyright © 2011 the authors 0270-6474/11/314991-09$15.00/0

This article is freely available online through the J Neurosci Open Choice option.

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Figure 5. — Fear response and brain activation in adolescent rats with intact mPFC. A, Percentage time freezing in adolescent rats exposed to an adult female rat or cat fur odor. Controls were exposed to empty cage. Cat-odor-exposed rats froze significantly more than female-exposed or control rats. n = 6–7 in each condition. B, Activation of the mPFC in adolescent rats with intact mPFC. Number of FOS-positive cells was significantly increased in prelimbic mPFC of rats exposed to the threatening stimulus (cat odor). n = 6 in each condition. C, Activation of the amygdala and PAG in adolescent rats with intact mPFC. Exposure to the threatening stimulus (cat odor) increased the number of FOS-positive cells in the medial and basolateral/lateral amygdala and vPAG, and exposure to the nonthreatening stimulus (adult female) increased FOS in the medial amygdala. MA, Medial amygdala; BL/LA, basolateral/lateral amygdala. **p < 0.01, ***p < 0.001. n = 7 in each condition.