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Expected value and sensitivity to punishment modulate insular cortex activity during risky decision making.

Zorina Von Siebenthal1, Olivier Boucher2,3, Latifa Lazzouni1

  • 1Département de psychologie, Université de Montréal, Montreal, QC, Canada.

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Summary

The right posterior insula tracks the expected value during risky decision-making. Individual differences in punishment sensitivity influence insula activity in these choices.

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Decision Neuroscience

Background:

  • The insula's role in risky decision-making is not fully understood.
  • Specific factors influencing insular activity during such choices require clarification.

Purpose of the Study:

  • To investigate how outcome valence, magnitude, probability, and expected value (EV) affect insular activity during risky decisions.
  • To explore the impact of reward sensitivity, punishment sensitivity, and anxiety on insular function in decision-making.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to study 31 participants performing a gambling task.
  • Participants chose between gambles with varying outcome magnitude, probability, and EV under gain and loss conditions.
  • Psychometric questionnaires assessed sensitivity to reward/punishment and anxiety levels.

Main Results:

  • Right posterior insula activation correlated with the expected value (EV) of the chosen risky option.
  • Increased sensitivity to punishment was associated with decreased bilateral insular activation.

Conclusions:

  • The right posterior insula plays a role in evaluating the expected value of risky choices.
  • Individual differences in punishment sensitivity modulate insular involvement in risky decision-making.