Figure 2. The effect of subanesthetic doses of midazolam. (A) During the postconditioning test, place preference (defined as the difference between time spent in the drug-paired compartment and the vehicle-paired compartment) for the different doses of midazolam. Error bars represent SEM. *P < 0.05 when compared with the 0-mg/kg dose. (B) Locomotor activity (defined as the mean activity counts/15 min for the four conditioning sessions) in the vehicle-paired compartment (white boxes) and in the midazolam-paired compartment (hatched boxes) for the different doses of midazolam. Error bars represent SEM. *P < 0.05 when compared with the 0-mg/kg dose.