Figure 5.

CeA lesions had no effects on the acquisition of food cup responding during the compound conditioning (overshadowing) phase of Experiment 3. In separate groups of rats, a novel light was compounded with either the feature (F) or target (TA) stimulus from a feature negative discrimination, or a consistently reinforced (TC) or nonreinforced (C) stimulus from the control discrimination, and paired with the delivery of a large magnitude high concentration sucrose reinforcer (see text and Table 1 for more details.) The designations CeA and sham refer to rats with neurotoxic or sham lesions of the amygdala central nucleus (CeA), respectively.