Fig. 2.

Behavior of animals in the cFos experiment. a Experimental phases: 5-min pre-stimulus during which the animal was freely exploring the apparatus, 45-min stimulus when the animal was exposed to the threat (toy animated snake) or control (black box) stimulus by raising a black cloth canopy, and post-experiment processing where the animal was anesthetized and perfused for histology and cFos immunostaining. b Defensive Behavior Index, each row corresponding to a different animal in the threat (top) and control (bottom) groups. Color code indicates the animal is hiding in the retreat box (cold) or exploring (warm). c Defensive Behavior Index (light color, individual traces; dark color, mean; 60 s bins) for animals in the threat (red) and control (blue) groups during the final training (habituation), baseline (pre-stimulus) and stimulus exposure (stimulus) sessions