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Mean ± s.em. responding during the reinforced A (tone or noise, counterbalanced) and C (clicker) and the nonreinforced B (noise or tone) conditioned stimuli (CSs), and the pre-CS periods in the initial acquisition phase (sessions c1→c8) of Experiment 1 and the reminder sessions of Experiment 2 (r1) and Experiment 3 (r3). CeA = rats with lesions of amygdala central nucleus; BLA = rats with lesions of basolateral amygdala.
