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Compensatory increase of functional connectivity density in adolescents with internet gaming disorder

Brain Imaging and Behavior volume 11, pages 1901–1909 (2017)Cite this article

Abstract

Behavioral studies have demonstrated visual attention bias and working memory deficits in individuals with internet gaming disorder (IGD). Neuroimaging studies demonstrated that individuals with IGD presented abnormalities in brain structures and functions including resting-state functional connectivity (rsFC) disturbance. However, most previous studies investigated IGD-related rsFC alterations by using hypothesis-driven methods with priori selection of a region of interest, which cannot provide a full picture of the rsFC changes in IGD individuals. In this study, we recruited 27 male IGD adolescents and 35 demographically matched healthy controls (HCs) to investigate abnormal connective property of each voxel within whole brain of IGD adolescents using resting-state functional connectivity density (rsFCD) method, and further to evaluate the relationship between altered rsFCD and behavioral performances of visual attention and working memory. The results exhibited no significant intergroup difference in behavioral performance (visual working memory and attention). The IGD adolescents exhibited higher global/long-range rsFCD in the bilateral dorsal lateral prefrontal cortex (DLPFC) and the right inferior temporal cortex (ITC)/fusiform compared with the HCs. Although no significant correlation survived after Bonferroni correction, higher global/long-range rsFCD of the bilateral DLPFC was correlated with the Young’s internet addiction test (IAT) score and/or behavioral performance in IGD adolescents using an uncorrected threshold of P < 0.05. In conclusion, IGD adolescents demonstrated increased rsFCD in the brain regions involved in working memory, spatial orientation and attention processing, which indicated that increased rsFCD may reflect a compensatory mechanism for maintaining the normal behavioral performance in IGD adolescents compared with the HCs.

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Authors and Affiliations

  1. Department of Radiology and Tianjin Key Laboratory of Functional Imaging, Tianjin Medical University General Hospital, No. 154, Anshan Road, Heping District, Tianjin, 300052, China

    Xin Du, Xin Qi, Yang Zhang & Quan Zhang

  2. Department of Psychology, Linyi Fourth People’s Hospital, Shandong Province, Linyi, 276005, China

    Yongxin Yang

  3. Department of Radiology, Linyi People’s Hospital, Shandong Province, Linyi, 276003, China

    Peihong Gao, Guijin Du & Xiaodong Li

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  1. Xin Du
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Correspondence to Xiaodong Li or Quan Zhang.

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The protocol of this study was approved by the Ethical Committee of Tianjin Medical University General Hospital, and all of the participants and their guardians provided written informed consent according to institutional guidelines.

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Xin Du and Yongxin Yang contributed equally to this work.

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Du, X., Yang, Y., Gao, P. et al. Compensatory increase of functional connectivity density in adolescents with internet gaming disorder. Brain Imaging and Behavior 11, 1901–1909 (2017). https://doi.org/10.1007/s11682-016-9655-x

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Keywords

  • Functional connectivity density
  • Functional magnetic resonance imaging
  • Internet gaming disorder
  • Working memory
  • Attention