Cortical thickness and volume abnormalities in Internet gaming disorder: Evidence from comparison of recreational Internet game users

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2018
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Wang, Ziliang
Yuan, Kai
Hu, Yanbo
Zheng, Hui
Du, Xiaoxia
Dong, Guangheng
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Zusammenfassung

Although online gaming may lead to Internet gaming disorder (IGD), most players are recreational game users (RGUs) who do not develop IGD. Thus far, little is known about brain structural abnormalities in IGD subjects relative to RGUs. The inclusion of RGUs as a control group could minimize the potential effects of gaming experience and gaming-related cue familiarity on the neural mechanism of IGD subjects. In this study, structural magnetic resonance imaging data were acquired from 38 IGD subjects and 66 RGUs with comparable age, gender, and educational level. Group differences in cortical thickness and volume were analyzed using the FreeSurfer software. Correlations between cortical changes and addiction severity were calculated for both groups. Compared with the RGU group, the IGD group showed significantly decreased cortical thickness in the left lateral orbitofrontal cortex, inferior parietal lobule, bilateral cuneus, precentral gyrus, and right middle temporal gyrus. Moreover, significantly reduced cortical volume was observed in the left superior temporal gyrus and right supramarginal gyrus in the IGD group. Whole-brain correlational analysis indicated different correlations between the two groups. The brain regions that showed group differences were considered to be involved in cognitive control, decision making, and reward/loss processing. These functions may serve as potential mechanisms that explain why IGD individuals experience negative outcomes in frequent game playing.

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150 Psychologie
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brain structure, FreeSurfer, IGD, RGU
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ISO 690WANG, Ziliang, Lingdan WU, Kai YUAN, Yanbo HU, Hui ZHENG, Xiaoxia DU, Guangheng DONG, 2018. Cortical thickness and volume abnormalities in Internet gaming disorder: Evidence from comparison of recreational Internet game users. In: The European journal of neuroscience. 2018, 48(1), pp. 1654-1666. ISSN 0953-816X. eISSN 1460-9568. Available under: doi: 10.1111/ejn.13987
BibTex
@article{Wang2018-06-08Corti-43056,
  year={2018},
  doi={10.1111/ejn.13987},
  title={Cortical thickness and volume abnormalities in Internet gaming disorder: Evidence from comparison of recreational Internet game users},
  number={1},
  volume={48},
  issn={0953-816X},
  journal={The European journal of neuroscience},
  pages={1654--1666},
  author={Wang, Ziliang and Wu, Lingdan and Yuan, Kai and Hu, Yanbo and Zheng, Hui and Du, Xiaoxia and Dong, Guangheng}
}
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    <dcterms:abstract xml:lang="eng">Although online gaming may lead to Internet gaming disorder (IGD), most players are recreational game users (RGUs) who do not develop IGD. Thus far, little is known about brain structural abnormalities in IGD subjects relative to RGUs. The inclusion of RGUs as a control group could minimize the potential effects of gaming experience and gaming-related cue familiarity on the neural mechanism of IGD subjects. In this study, structural magnetic resonance imaging data were acquired from 38 IGD subjects and 66 RGUs with comparable age, gender, and educational level. Group differences in cortical thickness and volume were analyzed using the FreeSurfer software. Correlations between cortical changes and addiction severity were calculated for both groups. Compared with the RGU group, the IGD group showed significantly decreased cortical thickness in the left lateral orbitofrontal cortex, inferior parietal lobule, bilateral cuneus, precentral gyrus, and right middle temporal gyrus. Moreover, significantly reduced cortical volume was observed in the left superior temporal gyrus and right supramarginal gyrus in the IGD group. Whole-brain correlational analysis indicated different correlations between the two groups. The brain regions that showed group differences were considered to be involved in cognitive control, decision making, and reward/loss processing. These functions may serve as potential mechanisms that explain why IGD individuals experience negative outcomes in frequent game playing.</dcterms:abstract>
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