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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. 1.

Fig. 1

a. Mean distance traveled scores (±SEM) of rats injected with saline or 30 mg/kg cocaine before a 30-min placement in the activity chambers on the pretreatment day (i.e., PD 19). b. Mean distance traveled scores of rats given a challenge injection of cocaine (20 mg/kg, IP) before the 180-min testing session on PD 21. Rats in the Cocaine-Activity group had been pretreated with cocaine (30 mg/kg, IP) before being placed in the activity chamber on PD 19, while rats in the Cocaine-Home group had been injected with cocaine 30 min after being returned to the home cage. The Acute Control group was injected with saline at both time points. Right panels show mean distance traveled collapsed across the testing sessions. *Significantly different from the control group (P<0.05)