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. Author manuscript; available in PMC: 2012 Sep 1.
Published in final edited form as: Pharmacol Biochem Behav. 2011 Apr 22;99(3):451–458. doi: 10.1016/j.pbb.2011.04.014

Figure 1.

Figure 1

Locomotor activity, as expressed in ambulations, for the 210 minute time course in rats treated with saline (Sal), methamphetamine (Ma; 0.3 mg/kg), morphine (Mor; 1.0, 5.0 or 10 mg/kg s.c.) or the combination of Ma and Mor. Two-way repeated measures ANOVA for the time course showed a significant effect of treatment, time and interaction at all three dose combinations (p≤0.01).