Table 1.

Assessment of behavioral sensitization to AMPH (Experiment 3).

Behavior	Experimental Groups
	SAL-SAL	SAL-AMPH	AMPH-SAL	AMPH-AMPH
Total distance traveled (Horizontal activity)	4107 ± 765	16812 ± 4046*	3956 ± 499	26597 ± 3363** ˆ
Vertical activity (Rearing)	402 ± 125	1730 ± 569*	373 ± 94	3073 ± 594** ˆ

Behavioral data are expressed as total distance traveled (cm) or vertical activity (beam breaks) measured over 3h following the SAL or AMPH (1 mg/kg i.p.) challenge administered to rats pretreated with repeated SAL or AMPH. Mean (± SEM), n = 6-8,

^*p<0.05,

^**p<0.01 vs. SAL-SAL,

^ˆp<0.05 vs. SAL-AMPH. SAL, saline; AMPH, amphetamine