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Language processing in Internet use disorder: Task-based fMRI study.

Gergely Darnai1,2,3, Gábor Perlaki2,3,4, Gergely Orsi3,4,5

  • 1Department of Behavioural Sciences, Medical School, University of Pécs, Pécs, Hungary.

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Internet Use Disorder (IUD) may impair language systems, not just reward circuits. Brain imaging reveals altered connectivity in language areas like Broca's, potentially explaining reduced verbal fluency in individuals with IUD.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Cognitive Science

Background:

  • Internet Use Disorder (IUD) is a growing behavioral addiction with known brain alterations.
  • Previous studies suggest language systems might also be affected in IUD.
  • The neural underpinnings of IUD's impact on language remain unclear.

Purpose of the Study:

  • To investigate functional brain changes in the language system during a word generation task in individuals with IUD.
  • To explore alterations in Broca's area connectivity in IUD.
  • To identify the neural basis for impaired verbal fluency in IUD.

Main Methods:

  • Utilized a silent word generation task to activate the language system.
  • Applied blood-oxygen-level-dependent (BOLD) activation and psychophysiological interaction (PPI) analyses.
  • Assessed IUD using the Problematic Internet Use Questionnaire and custom questions.

Main Results:

  • Individuals with IUD showed altered activation in default mode network (DMN) areas during the task.
  • Broca's area exhibited modified functional connectivity with other language and occipital regions in IUD.
  • Findings suggest DMN and language network alterations in IUD.

Conclusions:

  • The language system, particularly Broca's area, is implicated in the pathogenesis of IUD.
  • Altered functional connectivity in language networks may underlie decreased verbal fluency in IUD.
  • Beyond reward and inhibition systems, the language system is a key area for IUD research.