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Eur Psychiatry. 2016 Apr;34:36-42. doi: 10.1016/j.eurpsy.2016.01.2424. Epub 2016 Feb 27.

Dysfunctional default mode network and executive control network in people with Internet gaming disorder: Independent component analysis under a probability discounting task.

Author information

1
Department of Psychology, Zhejiang Normal University, 688 Yingbin Road, Jinhua, Zhejiang Province 321004, PR China.
2
Department of Psychology, University of Konstanz, Konstanz, Germany.
3
Department of Psychology, Zhejiang Normal University, 688 Yingbin Road, Jinhua, Zhejiang Province 321004, PR China; Center for Life Science, Peking University, Beijing, PR China.
4
Department of Physics, Shanghai Key Laboratory of Magnetic Resonance, East China Normal University, Shanghai, PR China.
5
Department of Psychology, Zhejiang Normal University, 688 Yingbin Road, Jinhua, Zhejiang Province 321004, PR China. Electronic address: dongguangheng@zjnu.edu.cn.

Abstract

BACKGROUND:

The present study identified the neural mechanism of risky decision-making in Internet gaming disorder (IGD) under a probability discounting task.

METHODS:

Independent component analysis was used on the functional magnetic resonance imaging data from 19 IGD subjects (22.2 ± 3.08 years) and 21 healthy controls (HC, 22.8 ± 3.5 years).

RESULTS:

For the behavioral results, IGD subjects prefer the risky to the fixed options and showed shorter reaction time compared to HC. For the imaging results, the IGD subjects showed higher task-related activity in default mode network (DMN) and less engagement in the executive control network (ECN) than HC when making the risky decisions. Also, we found the activities of DMN correlate negatively with the reaction time and the ECN correlate positively with the probability discounting rates.

CONCLUSIONS:

The results suggest that people with IGD show altered modulation in DMN and deficit in executive control function, which might be the reason for why the IGD subjects continue to play online games despite the potential negative consequences.

KEYWORDS:

Default mode network; Executive control network; Independent component analysis; Internet gaming disorder; Risky decision-making

PMID:
26928344
DOI:
10.1016/j.eurpsy.2016.01.2424
[Indexed for MEDLINE]

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