Figure 6.

Effects of post-training infusions of corticosterone (5 or 10 ng/μL) administered into the insular cortex (A), BLA (B), or hippocampus (C) on taste aversion as assessed on a 96-h retention test trial. Corticosterone (Cort) infused into either the insular cortex or BLA, but not hippocampus, induced a significant enhancement of taste aversion. Corticosterone infusions into the insular cortex or BLA did not induce aversion when administered to rats that were pseudo-conditioned with saline. The aversion index (mean + SEM) is expressed as the percent saccharin consumption on the retention test as compared with that during acquisition. (*) P < 0.05, (**) P < 0.01 as compared with the corresponding vehicle (Veh) group (n = 8–9 rats per group).