Individual differences in extraversion and dopamine genetics predict neural reward responses.

@article{Cohen2005IndividualDI,
  title={Individual differences in extraversion and dopamine genetics predict neural reward responses.},
  author={Michael X. Cohen and Jennifer Young and Jong-Min Baek and Christopher Kessler and Charan Ranganath},
  journal={Brain research. Cognitive brain research},
  year={2005},
  volume={25 3},
  pages={
          851-61
        }
}
Psychologists have linked the personality trait extraversion both to differences in reward sensitivity and to dopamine functioning, but little is known about how these differences are reflected in the functioning of the brain's dopaminergic neural reward system. Here, we show that individual differences in extraversion and the presence of the A1 allele on the dopamine D2 receptor gene predict activation magnitudes in the brain's reward system during a gambling task. In two functional MRI… 

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