Abstract
The medial prefrontal cortex (mPFC) is important for extinction of many behaviors including conditioned place preference (CPP). We examined the effects of intra-mPFC inactivation (with bupivacaine) on extinction of ethanol-induced CPP in mice. Injections of both bupivacaine and vehicle impaired extinction whereas no-surgery control mice extinguished normally. Consistent with recently reported effects of mPFC lesions, these data suggest that extinction was impaired by excessive mPFC damage induced by repeated intracranial infusions.
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