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The neural mechanisms of affect infusion in social economic decision-making: a mediating role of the anterior insula.

Abstract：

:Though emotions have been shown to have sometimes dramatic effects on decision-making, the neural mechanisms mediating these biases are relatively unexplored. Here, we investigated how incidental affect (i.e. emotional states unrelated to the decision at hand) may influence decisions, and how these biases are implemented in the brain. Nineteen adult participants made decisions which involved accepting or rejecting monetary offers from others in an Ultimatum Game while undergoing functional magnetic resonance imaging (fMRI). Prior to each set of decisions, participants watched a short video clip aimed at inducing either a sad or neutral emotional state. Results demonstrated that, as expected, sad participants rejected more unfair offers than those in the neutral condition. Neuroimaging analyses revealed that receiving unfair offers while in a sad mood elicited activity in brain areas related to aversive emotional states and somatosensory integration (anterior insula) and to cognitive conflict (anterior cingulate cortex). Sad participants also showed a diminished sensitivity in neural regions associated with reward processing (ventral striatum). Importantly, insular activation uniquely mediated the relationship between sadness and decision bias. This study is the first to reveal how subtle mood states can be integrated at the neural level to influence decision-making.

journal_name

Neuroimage

journal_title

NeuroImage

authors

Harlé KM,Chang LJ,van 't Wout M,Sanfey AG

doi

10.1016/j.neuroimage.2012.02.027

subject

Has Abstract

pub_date

2012-05-15 00:00:00

pages

32-40

issue

1

eissn

1053-8119

issn

1095-9572

pii

S1053-8119(12)00204-2

journal_volume

61

pub_type

杂志文章

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