Microstructure Abnormalities in Adolescents with Internet Addiction Disorder
Recent studies suggest that internet addiction disorder (IAD) is associated with structural abnormalities in brain gray matter. However, few studies have investigated the effects of internet addiction on the microstructural integrity of major neuronal fiber pathways, and almost no studies have assessed the microstructural changes with the duration of internet addiction.
We investigated the morphology of the brain in adolescents with IAD (N = 18) using an optimized voxel-based morphometry (VBM) technique, and studied the white matter fractional anisotropy (FA) changes using the diffusion tensor imaging (DTI) method, linking these brain structural measures to the duration of IAD. We provided evidences demonstrating the multiple structural changes of the brain in IAD subjects. VBM results indicated the decreased gray matter volume in the bilateral dorsolateral prefrontal cortex (DLPFC), the supplementary motor area (SMA), the orbitofrontal cortex (OFC), the cerebellum and the left rostral ACC (rACC). DTI analysis revealed the enhanced FA value of the left posterior limb of the internal capsule (PLIC) and reduced FA value in the white matter within the right parahippocampal gyrus (PHG). Gray matter volumes of the DLPFC, rACC, SMA, and white matter FA changes of the PLIC were significantly correlated with the duration of internet addiction in the adolescents with IAD.
Our results suggested that long-term internet addiction would result in brain structural alterations, which probably contributed to chronic dysfunction in subjects with IAD. The current study may shed further light on the potential brain effects of IAD.
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Problem Internet use and locus of control among college students:
Brian Rotsztein, M.A.
Lynch School of Education
Poster presented at
The 35th Annual Conference of the New England Educational Research Organization
Portsmouth, New Hampshire, April 10, 2003
Rapid growth and easy access to the Internet have facilitated its influence on the American way of life. Aside from the numerous benefits of this now ubiquitous technological tool, the problem of over use and the resulting
‘Internet Addiction’ is becoming increasingly apparent. College students represent a particularly vulnerable group for problem Internet use. The present study investigated the relationship between problem Internet use and locus of control among 706 undergraduate college students who completed questionnaires. Results indicated that a large proportion of students reported feelings of dissociation and symptoms of tolerance, withdrawal and escape. Moreover, frequent interpersonal and academic conflicts, and physical health-threatening risks related to problem Internet use were found. While men reported more Internet-related problems overall, women were more likely to attempt to cut back or stop their Internet use. A significant positive correlation between external locus of control and problem Internet use was found. Finally, men were seven times more likely
to gamble online.
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