Neural connectivity in Internet gaming disorder and alcohol use disorder: A resting-state EEG coherence study.
- Authors
- Park, Su Mi; Lee, Ji Yoon; Kim, Yeon Jin; Lee, Jun-Young; Jung, Hee Yeon; Sohn, Bo Kyung; Kim, Dai Jin; Choi, Jung-Seok
- Year
- 2017
- Journal
- Scientific reports
- PMID
- 28465521
- DOI
- 10.1038/s41598-017-01419-7
- PMCID
- PMC5430990
The present study compared neural connectivity and the level of phasic synchronization between neural populations in patients with Internet gaming disorder (IGD), patients with alcohol use disorder (AUD), and healthy controls (HCs) using resting-state electroencephalography (EEG) coherence analyses. For this study, 92 adult males were categorized into three groups: IGD (n = 30), AUD (n = 30), and HC (n = 32). The IGD group exhibited increased intrahemispheric gamma (30-40 Hz) coherence compared to the AUD and HC groups regardless of psychological features (e.g., depression, anxiety, and impulsivity) and right fronto-central gamma coherence positively predicted the scores of the Internet addiction test in all groups. In contrast, the AUD group showed marginal tendency of increased intrahemispheric theta (4-8 Hz) coherence relative to the HC group and this was dependent on the psychological features. The present findings indicate that patients with IGD and AUD exhibit different neurophysiological patterns of brain connectivity and that an increase in the fast phasic synchrony of gamma coherence might be a core neurophysiological feature of IGD.
Coherence without controlling effects of psychological covariates. The lines represent estimated coherence means of the groups by GEE at each location for the (a) delta, (b) theta, (c) alpha, (d) beta, and (e) gamma bands. The effects of demographic data (age, education, and IQ) were controlled; however, that of psychological data (scores on the BDI-II, BAI, and BIS-11) were not controlled in analyses. The meaning of bar scales ranging from −0.5 (blue) to 0.5 (red). Fisher’s Z-transformed scores were used for the EEG data. IGD = Internet gaming disorder; AUD = alcohol use disorder; HC = healthy control; GEE = generalized estimating model; EEG = electroencephalography; IQ = intelligence quotient; BDI-II = Beck Depression Inventory-II; BAI = Beck Anxiety Inventory; and BIS-11 = Barratt Impulsivity Scale-11.
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