Adaptive coding of reward value by dopamine neurons

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It is important for animals to estimate the value of rewards as accurately as, possible. Because the number of potential reward values is very large, it is necessary that the brain's limited resources be allocated so as to discriminate! better among more likely reward outcomes at the expense of less likely outcomes. We found that midbrain dopamine neurons rapidly adapted to the information provided by reward-predicting stimuli. Responses shifted relative to the expected reward value, and the gain adjusted to the variance of reward value. In this way, dopamine neurons maintained their reward sensitivity over a large range of reward values.
Publisher
AMER ASSOC ADVANCEMENT SCIENCE
Issue Date
2005-03
Language
English
Article Type
Article
Keywords

NEURAL BASIS; PREDICTION; MOTIVATION; MECHANISMS; CONTRAST

Citation

SCIENCE, v.307, no.5715, pp.1642 - 1645

ISSN
0036-8075
DOI
10.1126/science.1105370
URI
http://hdl.handle.net/10203/86437
Appears in Collection
BiS-Journal Papers(저널논문)
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