Figure 3.
Propranolol does not attenuate the recovery of freezing to the CS tested shortly after extinction. (A) Experimental design. (B) Extinction and average test for propranolol treatment 20 min prior to test. Points represent mean (±SEM) freezing to the tone averaged over two 20-sec stimulus presentations. Extinction was comparable across all groups. Propranolol was ineffective at reducing recovery of freezing in the 1-h group during the retention test ([*] P < 0.05). (C) Experimental design. (D) Propranolol given before extinction was unable to prevent recovery of freezing in the 1-h test group.
