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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.

Original publication

DOI

10.1016/j.bbr.2018.04.041

Type

Journal article

Journal

Behav Brain Res

Publication Date

27/04/2018

Keywords

Expected value, Orbitofrontal cortex, Reward, Reward probability, Risk, Value