Fig. 6.
FOS expression in amygdala central nucleus (CeA) after presentations of the light conditioned stimulus (CS) in the test session of experiment 2. (A) Mean ± SEM counts of FOS+ cells (adjusted for area) in the hemispheres ipsilateral (black bars) and contralateral (gray bars) to the lateral hypothalamic (LH) orexin-saporin or sham lesion. For groups sham (n = 12) and LH (n = 9), the light had been previously paired with food; and for group sham-U (n = 6), the light had been unpaired with food. (B–D) Sample FOS-stained sections of a sham-lesioned rat tested with CS+, a LH-lesioned rat tested with CS+, and a sham-lesioned rat tested with CS−. Approximate areas of lateral (lCeA) and medial (mCeA) CeA are enclosed in dotted lines. BLA, basolateral amygdala; st, stria terminalis.