Fronto-parietal regulation of media violence exposure in adolescents: A multi-method study

Maren Strenziok, Frank Krueger, Gopikrishna Deshpande, Rhoshel K. Lenroot, Elke Van der meer, Jordan Grafman*

*Corresponding author for this work

Research output: Contribution to journalArticle

37 Scopus citations

Abstract

Adolescents spend a significant part of their leisure time watching TV programs and movies that portray violence. It is unknown, however, how the extent of violent media use and the severity of aggression displayed affect adolescents' brain function. We investigated skin conductance responses, brain activation and functional brain connectivity to media violence in healthy adolescents. In an event-related functional magnetic resonance imaging experiment, subjects repeatedly viewed normed videos that displayed different degrees of aggressive behavior. We found a downward linear adaptation in skin conductance responses with increasing aggression and desensitization towards more aggressive videos. Our results further revealed adaptation in a fronto-parietal network including the left lateral orbitofrontal cortex (lOFC), right precuneus and bilateral inferior parietal lobules, again showing downward linear adaptations and desensitization towards more aggressive videos. Granger causality mapping analyses revealed attenuation in the left lOFC, indicating that activation during viewing aggressive media is driven by input from parietal regions that decreased over time, for more aggressive videos. We conclude that aggressive media activates an emotion-attention network that has the capability to blunt emotional responses through reduced attention with repeated viewing of aggressive media contents, which may restrict the linking of the consequences of aggression with an emotional response, and therefore potentially promotes aggressive attitudes and behavior. Published by Oxford University Press 2010.

Original languageEnglish (US)
Article numbernsq079
Pages (from-to)537-547
Number of pages11
JournalSocial cognitive and affective neuroscience
Volume6
Issue number5
DOIs
StatePublished - Oct 1 2011

Keywords

  • Aggression
  • Functional magnetic resonance imaging
  • Granger causality mapping
  • Skin conductance response
  • Violence

ASJC Scopus subject areas

  • Experimental and Cognitive Psychology
  • Cognitive Neuroscience

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