2013年1月
Risk-Responsive Orbitofrontal Neurons Track Acquired Salience
NEURON
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- 巻
- 77
- 号
- 2
- 開始ページ
- 251
- 終了ページ
- 258
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.neuron.2012.11.006
- 出版者・発行元
- CELL PRESS
Decision making is impacted by uncertainty and risk (i.e., variance). Activity in the orbitofrontal cortex, an area implicated in decision making, covaries with these quantities. However, this activity could reflect the heightened salience of situations in which multiple outcomes-reward and reward omission-are expected. To resolve these accounts, rats were trained to respond to cues predicting 100%, 67%, 33%, or 0% reward. Consistent with prior reports, some orbitofrontal neurons fired differently in anticipation of uncertain (33% and 67%) versus certain (100% and 0%) reward. However, over 90% of these neurons also fired differently prior to 100% versus 0% reward (or baseline) or prior to 33% versus 67% reward. These responses are inconsistent with risk but fit well with the representation of acquired salience linked to the sum of cue-outcome and cue-no-outcome associative strengths. These results expand our understanding of how the orbitofrontal cortex might regulate learning and behavior.
- リンク情報
- ID情報
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- DOI : 10.1016/j.neuron.2012.11.006
- ISSN : 0896-6273
- PubMed ID : 23352162
- Web of Science ID : WOS:000314199400008