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. Author manuscript; available in PMC: 2012 Aug 1.
Published in final edited form as: Neurobiol Dis. 2011 Apr 16;43(2):379–387. doi: 10.1016/j.nbd.2011.04.009

Figure 1.

Figure 1

Percent freezing during fear conditioning, extinction, and extinction retrieval training. WT (squares) and R6/2 (triangles) mice displayed similar levels of freezing during fear conditioning on day one (left). During extinction, WT mice froze significantly longer than R6/2 mice during training blocks 1–3. Extinction retrieval was comparable between genotypes. Asterisks (*) indicate significant difference (p<0.05) between genotypes based on Tukey-posthoc procedures.