Perception--but not expectation--of reward is altered in people with cocaine addiction
Researchers report that cocaine addiction disrupts the dopamine neurons that govern how we perceive and learn from rewards. Though people with cocaine addiction have similar expectations of rewards compared to controls, their dopamine neurons send out much weaker signals when these rewards are actually received. This dysregulation could make it more difficult for people with cocaine addiction to learn from their experiences and change addictive behavior.
http://dlvr.it/Sxzfyz
http://dlvr.it/Sxzfyz
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