Fig. 6.

Systemic 7-CTKA treatment produced no rewarding effects in the conditioned place preference (CPP) test. (A) Timeline of the experiment. (B) Conditioned place preference scores for rats during baseline (pretest) preference and during a test for the expression of CPP 1 day after training. The results showed that systemic intraperitoneal administration of 7-CTKA (1 mg/kg) did not alter the expression of CPP. The data are expressed as mean and standard error of the mean (n = 6–7). *p < 0.05, compared with the other experimental groups.