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The present study was done to determine whether cannabinoid CB1 receptors of the central amygdala (CeA) are implicated in morphine-induced place preference. Using a 3-day schedule of conditioning, it was found that subcutaneous (s.c.) administration of morphine (2, 4 and 6mg/kg) caused a significant dose-dependent conditioned place preference (CPP) in male Wistar rats. Intra-CeA microinjection of...
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