Table 2.

Effects of two doses of amphetamine (0.2 and 0.4 mg/kg) on [¹¹C]raclopride binding ratios (striatum/cerebellum −1) in four Rhesus monkeys

Monkey	Baseline	0.2 mg/kg	% baseline	Baseline	0.4 mg/kg	% baseline
1	1.9	1.6	−17.5	1.8	1.2	−33.3
2	2.0	2.1	+4.9	1.9	1.8	−7.8
3	1.7	1.4	−19.2	1.6	1.2	−25.5
4	2.3	2.1	−10.1	2.1	1.7	−18.4
Mean (±SEM)	2.0  (±0.1)	1.8  (±0.1)	−10.5*  (±5.5)	1.8  (±0.101)	1.4  (±0.1)	−21.3*  (±5.4)

^*t = 5.0, P = 0.015; % baseline, 0.2 mg/kg vs. % baseline, 0.4 mg/kg.