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. Author manuscript; available in PMC: 2013 Nov 14.
Published in final edited form as: Neurosci Lett. 2012 Oct 13;530(1):59–63. doi: 10.1016/j.neulet.2012.09.060

Figure 1.

Figure 1

Expression of conditioned place preference (CPP) induced by cocaine in Sprague-Dawley rats. Mean (SEM) seconds spent in the saline- and cocaine-paired compartments were recorded on a 30-min CPP test 4 days after the last cocaine conditioning test and compared to the 30-min pre-conditioning test 1 day before the cocaine conditioning phase. During conditioning, animals received cocaine at 10 mg/kg (A, Experiment I) or 30 mg/kg (B, Experiment II) (The data of control rats conditioned with saline in both compartments were not included). In the post-conditioning test, rats conditioned with cocaine displayed a preference for the cocaine-paired compartment. Data shown in graphs are treatment group mean + SEM. Significant differences are indicated: * p < 0.05 or *** p < 0.001.