Fig. 1.

Systemic administration of mifepristone, but not propranolol, impaired the reconsolidation of weak, but not strong, tone fear memory. After conditioning with a 0.5-s footshock, post-reactivation mifepristone (a), but not propranolol (b), impaired conditioned freezing to the tone, but not during the pre-CS period. After conditioning with a 1-s footshock, neither mifepristone (c) nor propranolol (d) impaired freezing during the pre-CS or tone periods. Data presented as mean + SEM (n = 7 per group)