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. 2009 Nov 25;16(1):106. doi: 10.1186/1423-0127-16-106

Figure 2.

Figure 2

Effect of morphine (1 mg/kg) to induce rewarding in the male offspring rats (p60) from different groups, which was measured by conditioned place preference (CPP) tests (A: Control group; B: Morphine group; C: M + DM group; D: DM group). Data were expressed as preference for the drug-paired compartment, which was determined by time spent in the drug-paired compartment minus time spent in the saline-paired compartment. Data were presented as mean ± SEM., and paired t-test was used to analyze the data (**p < 0.01 for day 6 vs. day 0; n ≧ 8).