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. 2014 Feb;21(2):73–81. doi: 10.1101/lm.032557.113

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© 2014 Siette et al.; Published by Cold Spring Harbor Laboratory Press

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Figure 5. — There were no group differences during the two conditioning sessions and there were no exercise differences when averaged across chamber reexposure. Animals that were exposed for 90 sec had higher levels of freezing compared to the other groups. In the sedentary controls, brief reexposure to the context results in higher levels of freezing (NR_90 sec) compared to the extended exposure group (NR_14 min). Exercise enhanced freezing following 90-sec exposure (R_90 sec) compared to sedentary rats (NR_90 sec), and exercise reduced levels of freezing following 14-min context reexposure, indicating enhanced extinction (R_14 min). (*) P < 0.05, (***) P < 0.005.