Two Dimensions of Value: Dopamine Neurons Represent Reward But Not Aversiveness

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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 indicates that reward and aversiveness are represented independently as two dimensions, even by neurons that are closely related to motor function. Because theory and experiment support the existence of opponent neural representations for value, the present results imply four types of value-sensitive neurons corresponding to reward-ON (dopamine), reward-OFF, aversive-ON, and aversive-OFF.
Publisher
AMER ASSOC ADVANCEMENT SCIENCE
Issue Date
2013-08
Language
English
Article Type
Article
Keywords

ROSTROMEDIAL TEGMENTAL NUCLEUS; LATERAL HABENULA; STIMULI; RESPONSES; SIGNALS; DIFFERENCE; PREDICTION; PUNISHMENT; ACTIVATION; AVOIDANCE

Citation

SCIENCE, v.341, no.6145, pp.546 - 549

ISSN
0036-8075
DOI
10.1126/science.1238699
URI
http://hdl.handle.net/10203/174209
Appears in Collection
BiS-Journal Papers(저널논문)
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