上瘾
心理学
互联网
神经科学
默认模式网络
临床心理学
网络成瘾症
作者
Hongxia Wang,Yan Sun,Fan Lan,Yan Liu
出处
期刊:Journal of behavioral addictions
[Akademiai Kiado Zrt.]
日期:2020-07-07
卷期号:9 (2): 325-338
标识
DOI:10.1556/2006.2020.00020
摘要
Background and aims The working memory (WM) ability of internet addicts and the topology underlying the WM processing in internet addiction (IA) are poorly understood. In this study, we employed a graph theoretical framework to characterize the topological properties of the IA brain network in the source cortical space during WM task. Methods A sample of 24 subjects with IA and 23 matched healthy controls (HCs) performed visual 2-back task. Exact Low Resolution Electromagnetic Tomography was adopted to project the pre-processed EEG signals into source space. Subsequently, Lagged phase synchronization was calculated between all pairs of Brodmann areas, the graph theoretical approaches were then employed to estimate the brain topological properties of all participants during the WM task. Results We found better WM behavioral performance in IA subjects compared with the HCs. Moreover, compared to the HC group, more integrated and hierarchical brain network was revealed in the IA subjects in alpha band. And altered regional centrality was mainly resided in frontal and limbic lobes. In addition, significant relationships between the IA severity and the significant altered graph indices were found. Conclusions In conclusion, these findings provide evidence to support the notion that altered topological configuration may underline changed WM function observed in IA.
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