Sections of the amygdala complex stained for c-Fos protein expression. Right and left hemispheres are shown from rats injected with muscimol or saline before the closed-door test. c-Fos expression is visible around the injector tip in both rats and throughout the amygdala in the saline-injected rat, but decreases rapidly with distance from the tip in the muscimol-injected rat. LA/BLA, lateral/basolateral amygdala; CeA, central amygdala; MeA, medial amygdala. Bar, 1 mm.