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. 2017 Nov 29;11:239. doi: 10.3389/fnbeh.2017.00239

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Copyright © 2017 Qureshi and Jha.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The comparative changes in percent freezing response in the NSD, SC and SD animals. (A) The NSD, SC and SD animals showed a comparable freezing response on the baseline day. The percent freezing in the SD animals was significantly less (p < 0.001, F_(2,18) = 13.82) compared to the NSD (Tukey p < 0.001) and SC (Tukey p < 0.01) animals. (B) In the SD animals, the precent freezing was significantly less on the testing day during the 0–2 min (compared to NSD group: Tukey p < 0.001; compared to SC group: Tukey p < 0.05), 2–4 min (compared to NSD group: Tukey p < 0.01; compared to SC group: Tukey p < 0.01) and 4–5 min (compared to NSD group: Tukey p < 0.01; compared to SC group: Tukey p < 0.01) time periods (the corresponding times of pre-shock, shock and post-shock periods of the training day). **p < 0.01 and ***p < 0.001 (compared to NSD group); ^#p < 0.05 and ^##p < 0.01 (compared to SC group).