Neural responses to various rewards and feedback in the brains of adolescent Internet addicts detected by functional magnetic resonance imaging
Article first published online: 19 FEB 2014
© 2014 The Authors. Psychiatry and Clinical Neurosciences © 2014 Japanese Society of Psychiatry and Neurology
Psychiatry and Clinical Neurosciences
Volume 68, Issue 6, pages 463–470, June 2014
How to Cite
Kim, J.-E., Son, J.-W., Choi, W.-H., Kim, Y.-R., Oh, J.-H., Lee, S. and Kim, J.-K. (2014), Neural responses to various rewards and feedback in the brains of adolescent Internet addicts detected by functional magnetic resonance imaging. Psychiatry and Clinical Neurosciences, 68: 463–470. doi: 10.1111/pcn.12154
- Issue published online: 3 JUN 2014
- Article first published online: 19 FEB 2014
- Manuscript Accepted: 19 DEC 2013
- Manuscript Revised: 7 DEC 2013
- Manuscript Received: 22 MAY 2013
- Chungbuk National University
- adolescent Internet addiction;
- functional magnetic resonance imaging;
This study aimed to examine differences in brain activation for various types of reward and feedback in adolescent Internet addicts (AIA) and normal adolescents (NA) using functional magnetic resonance imaging (fMRI).
AIA (n = 15) and NA (n = 15) underwent fMRI while performing easy tasks for which performance feedback (PF), social reward (SR) (such as compliments), or monetary reward (MR) was given. Using the no reward (NR) condition, three types of contrasts (PF–NR, SR–NR, and MR–NR) were analyzed.
In NA, we observed activation in the reward-related subcortical system, self-related brain region, and other brain areas for the three contrasts, but these brain areas showed almost no activation in AIA. Instead, AIA showed significant activation in the dorsolateral prefrontal cortex for the PF–NR contrast and the negative correlation was found between the level of activation in the left superior temporal gyrus (BA 22) and the duration of Internet game use per day in AIA.
These findings suggest that AIA show reduced levels of self-related brain activation and decreased reward sensitivity irrespective of the type of reward and feedback. AIA may be only sensitive to error monitoring regardless of positive feelings, such as sense of satisfaction or achievement.