Locomotor studies of nuciferine.

(a) Nuciferine suppresses the PCP-induced hyperlocomotor response. Data are presented as total distance travelled in 5-minute bins (left) and as cumulative distance travelled between minute 45 and minute 60 (right). N = 18 mice; ^p<0.05, compared to PCP group. (b) Nuciferine (3.0 mg/kg, 15 minute pretreatment) enhances the hyperlocomotor effect of amphetamine (3.0 mg/kg) administration. N = 14 mice; * < 0.001 compared to Amphetamine group. Data are presented as above.