Genetic variation in dopaminergic reward in humans.

Abstract excerpt

Dopamine-based reward circuitry appears to play a role in encoding reward from eating and incentive sensitization, whereby cues associated with food reward acquire motivational value. Data suggest that low levels of dopamine D2 receptors and attenuated responsivity of dopamine-target regions (e.g. the striatum) to food and food cues are associated with elevated weight. There is mixed evidence that genotypes that...

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