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Altered Regional Cerebral Glucose Metabolism in Internet Game Overusers: A F-18-fluorodeoxyglucose Positron Emission Tomography Study

Authors
Park, Hyun SooKim, Sang HeeBang, Seong AeYoon, Eun JinCho, Sang SooKim, Sang Eun
Issue Date
Mar-2010
Publisher
M B L COMMUNICATIONS, INC
Citation
CNS SPECTRUMS, v.15, no.3, pp.159 - 166
Indexed
SCIE
SCOPUS
Journal Title
CNS SPECTRUMS
Volume
15
Number
3
Start Page
159
End Page
166
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/116873
DOI
10.1017/S1092852900027437
ISSN
1092-8529
Abstract
Introduction: Internet game overuse is an emerging disorder and features diminished impulse control and poor reward-processing. In an attempt to understand the neurobiological bases of Internet game overuse, we investigated the differences in regional cerebral glucose metabolism at resting state between young individuals with Internet game overuse and those with normal use using F-18-fluorodeoxyglucose positron emission tomography study. Methods: Twenty right-handed male participants (9 normal users: 24.7 +/- 2.4 years of age, 11 overusers: 23.5 +/- 2.9 years of age) participated. A trait measure of impulsivity was also completed after scanning. Results: Internet game overusers showed greater impulsiveness than the normal usersand there was a positive correlation between the severity of Internet game overuse and impulsiveness. Imaging data showed that the overusers had increased glucose metabolism in the right middle orbitofrontal gyrus, left caudate nucleus, and right insula, and decreased metabolism in the bilateral postcentral gyrus, left precentral gyrus, and bilateral occipital regions compared to normal users. Conclusion: Internet game overuse may be associated with abnormal neurobiological mechanisms in the orbitofrontal cortex, striatum, and sensory regions, which are implicated in impulse control, reward processing, and somatic representation of previous experiences. Our results support the idea that Internet game overuse shares psychological and neural mechanisms with other types of impulse control disorders and substance/non-substance-related addiction. CNS Spectr. 2010;15(3):159-166
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