Effects of clozapine (CLZ) 0.2 mg kg−1 s.c. alone (A), effects of the co-administration of clozapine (0.2 mg kg−1) and apomorphine (APO) on 0.01 mg kg−1 s.c. (B), 0.05 mg kg−1 s.c. (C), 0.1 mg kg−1 s.c. (D), 0.2 mg kg−1 s.c. (E) or 0.5 mg kg−1 s.c. (F) in rats. The ordinate represents the percentage change in EEG power. Vertical bars for each Hz show 95% confidence intervals. Panels on the left show data from prefrontal cortex, panels on the right show data from sensorimotor cortex.