Effects of Mus microinjection to the BLA on IEGs expression. a zif268 mRNA expression levels in the BLA, vHIP and mPFC. b arc mRNA expression in the BLA, vHIP and mPFC. c Representative images of c-Fos in vHIP. d Numbers of c-Fos-positive cell in vHIP were calculated and statistically analyzed. e Representative images of c-Fos in mPFC. f Numbers of c-fos-positive cell in mPFC were calculated and statistically analyzed. Independent student t test was used, *p < 0.05 compared with the saline-group, n = 4