Representative images of pERK expression in home cage control males (a,c,e,g) and following exposure to the conditioned aversive cue, ie, the female (b,d,f,h) in experiment 1. CeA, central amygdala; cc, corpus callosum; CPu, caudate putamen; LV, lateral ventricle; mPFC, medial prefrontal cortex; OFC, orbitofrontal cortex (l: lateral; m: medial); st, stria terminalis. Circle in h indicates location of CeA. Scale bar indicates 200 μm.