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Task-based functional connectivity in internet gaming disorder: A systematic review.

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|February 10, 2026
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Summary
This summary is machine-generated.

Internet gaming disorder (IGD) shows altered brain connectivity, impacting reward and control networks. These functional connectivity (FC) changes align with addiction models but require more research for generalizability.

Keywords:
AddictionCue-reactivityFunctional connectivityGamingIGDTask-basedfMRI

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Addiction Research

Background:

  • Internet gaming disorder (IGD) is a growing public health issue with unclear neural underpinnings.
  • Excessive gaming leads to distress and dysfunction, necessitating understanding of brain mechanisms.
  • Aberrant functional connectivity (FC) is implicated in IGD's pathological behaviors and addiction models.

Purpose of the Study:

  • To systematically review functional connectivity (FC) changes in Internet gaming disorder (IGD).
  • To investigate how FC alterations relate to behavioral symptoms in IGD.
  • To assess alignment of IGD neurobiology with established addiction models.

Main Methods:

  • Systematic review of 29 studies (2013-2024) on IGD functional connectivity (FC).
  • Analysis of task-based fMRI data from 1,129 IGD participants and 924 controls.
  • Categorization of tasks into reward responsiveness, executive control, and impulsivity/risk-taking.

Main Results:

  • IGD individuals showed increased reward network FC, often with decreased executive control network (ECN) FC.
  • Varied increases and decreases in ECN FC were observed during executive control tasks in IGD.
  • Higher impulsivity and risk-taking correlated with increased reward network and ECN FC in IGD.

Conclusions:

  • Aberrant FC is a hallmark of IGD, with varied connectivity patterns.
  • Increased FC may represent compensatory mechanisms, while decreased FC suggests impairment.
  • Geographical bias and methodological heterogeneity limit generalizability and necessitate research consensus.