Fig. 7.

The neural activities in the auditory cortex to the CS (12 kHz)/non-CS (4, 8, 16 kHz) sounds and the electric foot-shocks in a the Normal conditioning group and b the Sham conditioning group. The normalized cross-correlation between the activated area in response to the CS (12 kHz)/non-CS(4, 8, 16 kHz) sounds and that to the electric foot-shock in c the Normal conditioning group and d the Sham conditioning group. Error bar is SEM. Normal: n = 6, Sham: n = 6, **p < 0.01, NS no significant differences