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Exposure to stressors can impact on the responsiveness to drugs of abuse, and glucocorticoid hormones (CORT) may interact with dopamine (DA) within the nucleus accumbens shell (NAcs) to mediate these responses. We have previously shown that the CORT response to morphine, but not to a previous uncontrollable stressor, is necessary for the stress-induced potentiation of morphine's rewarding effects...
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