TY - JOUR

T1 - The neural correlates of subjective utility of monetary outcome and probability weight in economic and in motor decision under risk

AU - Wu, Shih Wei

AU - Delgado, Mauricio R.

AU - Maloney, Laurence T.

PY - 2011/6/15

Y1 - 2011/6/15

N2 - In decision under risk, people choose between lotteries that contain a list of potential outcomes paired with their probabilities of occurrence. We previously developed a method for translating such lotteries to mathematically equivalent "motor lotteries." The probability ofeach outcomeina motor lotteryis determinedby the subject's noiseinexecuting amovement.Inthis study,weused functional magnetic resonance imaging in humans to compare the neural correlates of monetary outcome and probability in classical lottery tasks inwhich informationaboutprobabilitywas explicitlycommunicatedtothe subjectsandinmathematicallyequivalentmotorlotterytasks in which probability was implicit in the subjects' own motor noise.Wefound that activityinthe medial prefrontal cortex (mPFC) and the posterior cingulate cortex quantitatively represent the subjective utility of monetary outcome in both tasks. For probability, we found that the mPFC significantly tracked the distortion of such information in both tasks. Specifically, activity in mPFC represents probability information but not the physical properties ofthe stimuli correlated with this information. Together, the results demonstrate that mPFC represents probability from two distinct forms of decision under risk.

AB - In decision under risk, people choose between lotteries that contain a list of potential outcomes paired with their probabilities of occurrence. We previously developed a method for translating such lotteries to mathematically equivalent "motor lotteries." The probability ofeach outcomeina motor lotteryis determinedby the subject's noiseinexecuting amovement.Inthis study,weused functional magnetic resonance imaging in humans to compare the neural correlates of monetary outcome and probability in classical lottery tasks inwhich informationaboutprobabilitywas explicitlycommunicatedtothe subjectsandinmathematicallyequivalentmotorlotterytasks in which probability was implicit in the subjects' own motor noise.Wefound that activityinthe medial prefrontal cortex (mPFC) and the posterior cingulate cortex quantitatively represent the subjective utility of monetary outcome in both tasks. For probability, we found that the mPFC significantly tracked the distortion of such information in both tasks. Specifically, activity in mPFC represents probability information but not the physical properties ofthe stimuli correlated with this information. Together, the results demonstrate that mPFC represents probability from two distinct forms of decision under risk.

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U2 - 10.1523/JNEUROSCI.0540-11.2011

DO - 10.1523/JNEUROSCI.0540-11.2011

M3 - Article

C2 - 21677166

AN - SCOPUS:79959313731

SN - 0270-6474

VL - 31

SP - 8822

EP - 8831

JO - Journal of Neuroscience

JF - Journal of Neuroscience

IS - 24

ER -