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. 2011 Jan;336(1):134–144. doi: 10.1124/jpet.110.170431

Fig. 6.

Fig. 6.

Fear conditioning during training. A and B, HA/HA mice show facilitated acquisition of conditional fear during training to the three tone–1-mA shock pairings (A, p < 0.0001) and the six tone–1-mA shock pairings (B, p < 0.005) compared with SL/SL mice. T refers to tone, and PT refers to posttone. C, HA/HA mice displayed increased performance on the fear to context test compared with SL/SL mice after training with either the three or six tone–shock pairings. D, HA/HA mice displayed increased performance on the fear to tone test compared with SL/SL mice after the six, but not the three, tone–shock pairings. n = 8–14/genotype. *, p < 0.05; **, p < 0.001; ***, p < 0.005.