Effects of i.cb. microinjection of hispidulin on disruptions of METH‐PPI, Ketamine‐PPI and MK‐PPI. Hispidulin (10 or 50 nmol) or vehicle was administered by microinjection at the lateral cerebellum (i.cb.) bilaterally 10 min before injection of (A) methamphetamine (METH; 2 mg·kg−1, i.p.), (B) ketamine (30 mg·kg−1, i.p.) or (C) MK‐801 (0.3 mg·kg−1, i.p.). PPI was measured and analysed as in Figure 2. Data shown are means ± SEM; n = 8. *
P < 0.05, significantly different from the control group; #
P < 0.05, significantly different from the vehicle group.