Figure 3.

Upper section: Experimental design for the modulatory task used in Experiment 2. The Pavlovian threat conditioning (PTC) session took place on the first day of training. Subjects underwent the suppression (cSup) and then facilitation (cFac) components. USAP refers to unsignaled approach training and unsignaled sidman active avoidance (USAA) to USAA training phases where the two-way shuttle response was acquired in reward vs. avoidance procedures. After recovery from CeA lesions, additional tests were conducted. Lower section: Data collected for Experiment 2. Suppression test data are presented in (A) in terms of responses per minute during the Pre CS and CS periods and (B) in terms of the suppression ratio (CSresponding/CSresponding + PreCSresponding). USAA training data are presented in (C) for each three-session block in terms of mean avoidance responses per block. Data from the pre-surgical tests for conditioned facilitation and conditioned suppression are presented on the left of (D) and the post surgical tests on the right side. These data are presented in terms of percent of Pre CS responding for each test. *p < 0.05.