O'Neill Martin, Schultz Wolfram
Department of Experimental Psychology, University of Oxford, Tinsley Building, Mansfield Road, Oxford, OX1 3TA, UK.
Department of Physiology, Development and Neuroscience, University of Cambridge, Downing Street, Cambridge, CB2 3EG, UK.
Behav Brain Res. 2018 Dec 14;355:90-94. doi: 10.1016/j.bbr.2018.04.041. Epub 2018 Apr 27.
Uncertain reward outcomes are characterised by statistical parameters that capture the numerical values of the underlying probability distributions of reward values, including the expected value, risk (variance) and probability. Here we show coding of an integrated expected value signal by single orbitofrontal neurons in response to visual cues predicting uncertain rewards. Separate subpopulations of orbitofrontal neurons predominantly code the prediction of one statistical parameter with few neurons showing combined coding. These signals are likely combined with subjective value signals to inform learning and decision making under conditions of uncertainty.
不确定的奖励结果具有一些统计参数，这些参数反映了奖励值潜在概率分布的数值，包括期望值、风险（方差）和概率。在此，我们展示了单个眶额神经元对预测不确定奖励的视觉线索做出反应时，对综合期望值信号的编码。眶额神经元的不同亚群主要编码一个统计参数的预测，只有少数神经元表现出联合编码。这些信号可能与主观价值信号相结合，以在不确定条件下为学习和决策提供信息。
