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Increased brain activity predicts future onset of substance use

Do people get caught in the cycle of overeating and drug addiction because their brain reward centers are over-active, causing them to experience greater cravings for food or drugs? In a unique prospective study scientists tested this theory, called the reward surfeit model. The results indicated that elevated responsivity of reward regions in the brain increased the risk for future substance use, which has never been tested before prospectively with humans.
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