Fig. 4.
In humans, retrieval of drug-cue memories 10 min before the extinction sessions caused long-lasting attenuation of cue-induced increases in systolic and diastolic blood pressure but not heart rate. The experimental procedure was identical to that described in Fig. 3. (A) Heart rate. (B) Systolic blood pressure. (C) Diastolic blood pressure. Asterisk indicates different from “no memory retrieval” group; P < 0.05, n = 22 human subjects per group for day 1, 4, and 34; n = 16 to 18 human subjects per group for day 184.