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Neural reward processing is modulated by approach- and avoidance-related personality traits

Simon, Joe J
Walther, Stephan
Fiebach, Christian J
Friederich, Hans-Christoph
Stippich, Christoph
Weisbrod, Matthias
Published in NeuroImage. 2010, vol. 49, no. 2, p. 1868-1874
Abstract The neural processing of reward can be differentiated into two sub-components with different functions, "wanting" (i.e., the expectation of a reward which includes appetitive and motivational components) and "liking" (i.e., the hedonic impact experienced during the receipt of a reward), involving distinct neural systems. We hypothesize that variability in neural reward processing previously observed in healthy subjects could reflect inter-individual differences in personality. Therefore, the aim of this study was to investigate how the neural processing during expectation and reception of a reward depends on interpersonal differences in reward sensitivity, more specifically the tendency to approach vs. avoid reward-related situations. We employed event-related functional magnetic resonance imaging during a monetary incentive delay task. Subjects with a high approach motivation showed more activation of the Ventral Striatum (VS) during the receipt of a reward, and more medial orbitofrontal activity during both the receipt and omission of a reward. Subjects with a high behavioral inhibition showed less activation in the VS during the receipt of a reward. These findings indicate that the tendency to approach or avoid reward-related situations exhibits a distinct relation with neural reward processing. Specifically, subjects with high behavioral approach appear to be sensitive mainly to positive outcomes and to a lesser extent to the omissions of rewards, whereas subjects with low behavioral approach as well as those with a high inhibition tendency display a blunted response to rewards.
Keywords Brain/physiologyBrain MappingCuesExecutive Function/physiologyFemaleHumansMagnetic Resonance ImagingMaleNeuropsychological TestsPersonality/physiologyPersonality TestsPsychometricsReaction TimeRewardSurveys and QuestionnairesTask Performance and AnalysisYoung Adult
PMID: 19770056
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SIMON, Joe J et al. Neural reward processing is modulated by approach- and avoidance-related personality traits. In: NeuroImage, 2010, vol. 49, n° 2, p. 1868-1874. doi: 10.1016/j.neuroimage.2009.09.016

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Deposited on : 2017-12-20

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