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Modulating Activity in the Prefrontal Cortex Changes Intertemporal Choice for Loss: A Transcranial Direct Current

Guanxing Xiong1,2, Xi Li1,2, Zhiqiang Dong1,2

  • 1School of Economics and Management, South China Normal University, Guangzhou, China.

Frontiers in Human Neuroscience
|June 11, 2019
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Summary

Investigating intertemporal choice for losses, this study found left dorsolateral prefrontal cortex (DLPFC) stimulation altered decision-making. Left anodal/right cathodal transcranial direct current stimulation (tDCS) reduced the tendency to avoid delayed losses.

Keywords:
delay discountingdorsolateral prefrontal cortexintertemporal choicelosstranscranial direct current stimulation

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Decision Science

Background:

  • Intertemporal choice involves weighing present versus future costs and benefits.
  • The dorsolateral prefrontal cortex (DLPFC) is implicated in intertemporal choice for gains.
  • Causal evidence for DLPFC involvement in intertemporal choice for losses is lacking.

Purpose of the Study:

  • To investigate the causal role of the DLPFC in intertemporal decision-making for losses.
  • To examine how bifrontal transcranial direct current stimulation (tDCS) affects loss-based delay discounting.

Main Methods:

  • Sixty participants completed delay discounting tasks for losses.
  • Participants received either right anodal/left cathodal, left anodal/right cathodal, or sham tDCS over the prefrontal cortex.
  • Intertemporal preferences for losses were assessed under different stimulation conditions.

Main Results:

  • Left anodal/right cathodal tDCS led participants to choose larger delayed losses.
  • This stimulation significantly decreased the delay discounting rate compared to sham.
  • Findings suggest DLPFC activity is crucial for intertemporal loss decisions.

Conclusions:

  • Dorsolateral prefrontal cortex (DLPFC) activity is causally linked to intertemporal choice for losses.
  • Modulating DLPFC function with transcranial direct current stimulation (tDCS) can alter loss-based decision-making.
  • This research provides critical insights into the neural mechanisms underlying financial risk-taking and loss aversion.