Fig. 3.

Threat-evoked cFos immunolabel in VMH and PAG. a Robust cFos immunostained cells were found in the dorsomedial VMH in animals exposed to snake threat (red dots indicate cFos + cells in representative animal; N = 2). b Representative coronal sections of the marmoset brain showing cFos immunolabeling in VMH of animals exposed to the threat. c–e High powered images from insets showing cFos + cells identified within the VMH. The arcuate (Arc) and paraventricular nucleus of the hypothalamus (PVH) contained cFos + cells in both threat and control animals. f cFos-immunostained cells were found in the dorsomedial PAG in animals exposed to snake threat. g Representative coronal sections of the marmoset brain showing cFos immunolabeling in dPAG of animals exposed to the threat. h–j High powered images from insets showing cFos + cells identified within the dPAG (numbers indicate animal ID; a, b scale 200 µm; c–e scale 20 µm)