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Reducing aggressive responses to social exclusion using transcranial direct current stimulation.

Paolo Riva1, Leonor J Romero Lauro2, C Nathan DeWall2

  • 1Department of Psychology, University of Milano-Bicocca, Milano, Italy, Department of Psychology, University of Kentucky, Lexington, KY, USA, Department of Psychology, The Ohio State University, OH, USA, and Department of Communication Science, VU University Amsterdam, Amsterdam, The Netherlands paolo.riva1@unimib.it.

Social Cognitive and Affective Neuroscience
|April 22, 2014
PubMed
Summary

Non-invasive brain stimulation using transcranial direct current stimulation (tDCS) over the right ventrolateral pre-frontal cortex (rVLPFC) effectively reduced aggression following social exclusion. This intervention normalized aggressive behavior in excluded individuals.

Keywords:
aggressionemotion regulationsocial exclusionsocial paintranscranial direct current stimulation (tDCS)

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Area of Science:

  • Neuroscience
  • Social Psychology
  • Psychiatry

Background:

  • Social exclusion is a known trigger for aggression.
  • Neural mechanisms underlying aggression regulation after social exclusion remain unclear.
  • The right ventrolateral pre-frontal cortex (rVLPFC) is implicated in regulating distress.

Purpose of the Study:

  • To investigate if transcranial direct current stimulation (tDCS) over the rVLPFC can reduce aggression after social exclusion.
  • To causally test the role of the rVLPFC in modulating aggressive responses to social exclusion.

Main Methods:

  • Participants underwent social exclusion or inclusion scenarios.
  • tDCS or sham stimulation was applied to the rVLPFC.
  • Behavioral aggression was measured after the stimulation and social manipulation.

Main Results:

  • Socially excluded participants showed reduced aggression when receiving tDCS over the rVLPFC compared to sham stimulation.
  • tDCS-treated excluded participants exhibited aggression levels similar to included participants.
  • tDCS did not affect aggression levels in socially included participants.

Conclusions:

  • Modulating rVLPFC activity via tDCS can effectively reduce aggression stemming from social exclusion.
  • This study provides the first causal evidence for the rVLPFC's role in regulating aggression.
  • Targeting the rVLPFC offers a potential strategy to mitigate aggression linked to social exclusion.