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Loss aversion is associated with bilateral insula volume. A voxel based morphometry study.

S Markett1, G Heeren2, C Montag3

  • 1Department of Psychology, University of Bonn, Germany; Center for Economics and Neuroscience, University of Bonn, Germany.

Neuroscience Letters
|March 26, 2016
PubMed
Summary
This summary is machine-generated.

Individuals with higher loss aversion, a bias towards avoiding losses, show reduced gray matter volume in specific brain regions. This suggests structural brain differences influence decision-making biases.

Keywords:
Loss aversionPosterior insulaSalience networkVBM

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Area of Science:

  • Neuroscience
  • Decision Science
  • Cognitive Psychology

Background:

  • Loss aversion is a cognitive bias where individuals feel losses more intensely than equivalent gains.
  • Neuroscientific studies implicate brain regions like the ventromedial prefrontal cortex, ventral striatum, amygdala, and insula in processing gains and losses.
  • These structures form a neural system underlying loss aversion.

Purpose of the Study:

  • To investigate the relationship between brain structure and individual differences in loss aversion.
  • To identify specific brain regions whose gray matter volume correlates with the degree of loss aversion.

Main Methods:

  • Voxel-based morphometry (VBM) was applied to structural magnetic resonance imaging (MRI) data.
  • Structural brain images from 41 healthy participants were analyzed.
  • Gray matter volume was correlated with individual loss aversion scores.

Main Results:

  • A significant negative correlation was found between gray matter volume in the bilateral posterior insula and left medial frontal gyrus and individual loss aversion.
  • Higher levels of loss aversion were associated with lower gray matter volumes in these specific brain areas.
  • These regions are part of the brain's salience network, involved in interoception and salience detection.

Conclusions:

  • Structural variations in the posterior insula and medial frontal gyrus may underlie individual differences in loss aversion.
  • These findings suggest that altered processing of losses and salience due to structural brain differences can bias decision-making towards avoiding negative outcomes.