Two dimensions of value: dopamine neurons represent reward but not aversiveness.

@article{Fiorillo2013TwoDO,
  title={Two dimensions of value: dopamine neurons represent reward but not aversiveness.},
  author={Christopher D. Fiorillo},
  journal={Science},
  year={2013},
  volume={341 6145},
  pages={546-9}
}
Whereas reward (appetitiveness) and aversiveness (punishment) have been distinguished as two discrete dimensions within psychology and behavior, physiological and computational models of their neural representation have treated them as opposite sides of a single continuous dimension of "value." Here, I show that although dopamine neurons of the primate ventral midbrain are activated by evidence for reward and suppressed by evidence against reward, they are insensitive to aversiveness. This… CONTINUE READING