Figure 1.

Nifedipine does not affect acquisition of fear conditioning. (A) Schematic overview of the protocol. (B–E) Recall of fear conditioning on day 2 of the protocol. (B,D) 30 mg/kg nifedipine s.c. (n = 8) or vehicle (n = 8) were injected 20 min before conditioning. (C,E) 30 mg/kg nifedipine s.c. (n = 8) or vehicle (n = 8) were injected 2 h before conditioning. (B,C) Freezing 24 h after conditioning in context A. (D,E) Freezing 1 h later in context B (pre-Cue) and with acoustic cue (Cue). (Black symbols) Injection with nifedipine, (white symbols) injection with vehicle. Data are expressed as mean and SEM.