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. Author manuscript; available in PMC: 2008 Aug 27.
Published in final edited form as: Pharmacol Biochem Behav. 2007 Jan 20;86(3):511–515. doi: 10.1016/j.pbb.2007.01.012

Figure 1.

Figure 1

Effects of a challenge injection of methamphetamine (METH; 0.4 mg/kg) or saline (SAL) on horizontal (A) and vertical activity (B) in rats (n =8 /group) administered 3.5 h after SAL or METH (4.0 mg/kg) administration. Data points are represented as mean horizontal activity (A) or mean vertical activity (B) ± SEM. Inset graphs represent total activity during the first 100 min after challenge injection. * = p < 0.05 significantly different than SAL-SAL. ^ = p <0.05 significantly different from SAL-METH.