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. Author manuscript; available in PMC: 2012 Oct 1.
Published in final edited form as: Psychopharmacology (Berl). 2011 May 3;217(4):559–571. doi: 10.1007/s00213-011-2316-2

Fig. 3.

Fig. 3

a. Mean distance traveled scores (±SEM) of rats injected with saline or methamphetamine (Meth; 2 or 4 mg/kg, IP) before a 30-min placement in the activity chambers during the pretreatment phase (i.e., PD 16–19). b. Mean distance traveled scores of rats given a challenge injection of 1 mg/kg (upper graph) or 2 mg/kg (lower graph) Meth before the 180-min testing session on PD 21. Rats in the Meth-Activity groups had been pretreated with methamphetamine (2 or 4 mg/kg, IP) in the activity chambers on PD 16–19, while rats in the Acute Control groups were injected with saline. The right panels show mean distance traveled collapsed across the pretreatment phase and the test day. *Significantly different from the control group (P<0.05)