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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Neural computations underlying action-based decision making in the human brain
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Neural computations underlying action-based decision making in the human brain

机译：人脑中基于动作的决策基础的神经计算

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摘要

Action-based decision making involves choices between different physical actions to obtain rewards. To make such decisions the brain needs to assign a value to each action and then compare them to make a choice. Using fMRI in human subjects, we found evidence for action-value signals in supplementary motor cortex. Separate brain regions, most prominently ventromedial prefrontal cortex, were involved in encoding the expected value of the action that was ultimately taken. These findings differentiate two main forms of value signals in the human brain: those relating to the value of each available action, likely reflecting signals that are a precursor of choice, and those corresponding to the expected value of the action that is subsequently chosen, and therefore reflecting the consequence of the decision process. Furthermore, we also found signals in the dorso-medial frontal cortex that resemble the output of a decision comparator, which implicates this region in the computation of the decision itself.
机译：基于动作的决策涉及在不同的身体动作之间进行选择以获得奖励。为了做出这样的决定，大脑需要为每个动作分配一个值，然后比较它们以做出选择。在人类受试者中使用功能磁共振成像，我们发现了补充运动皮层中动作值信号的证据。分开的大脑区域（最显着的腹膜前额叶皮层）参与了最终采取行动的预期值的编码。这些发现区分了人类大脑中价值信号的两种主要形式：与每个可用动作的价值有关的，可能反映了选择先兆的信号以及与随后选择的动作的预期值相对应的信号；以及因此反映了决策过程的结果。此外，我们还在背内侧额叶皮层中发现了类似于决策比较器输出的信号，该信号将这一区域牵涉到决策本身的计算中。

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  • 作者

    Klaus Wunderlich; Antonio Rangel; John P. ODoherty;

  • 作者单位

    Computation and Neural Systems Program, California Institute of Technology, Pasadena, CA;

    Computation and Neural Systems Program, California Institute of Technology, Pasadena, CA Division of Humanities and Social Sciences, California Institute of Technology, Pasadena, CA;

    Computation and Neural Systems Program, California Institute of Technology, Pasadena, CA Division of Humanities and Social Sciences, California Institute of Technology, Pasadena, CA Institute of Neuroscience and School of Psychology, Trinity College, Dublin, Ireland;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    acc; action value; reinforcement learning; sma; vmpfc;

    机译：acc;动作值强化学习;sma;vmpfc;

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