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1- shahid beheshti university
Abstract:   (430 Views)
Introduction: Attention Deficit Hyperactivity Disorder (ADHD as a neurodevelopmental disorder includes three subtypes predominantly inattentive (ADHD-I), predominantly impulsive/hyperactive (ADHD-H), and predominantly combined (ADHD-C) that has formed a heterogeneity disorder due to differences in pathology and syndrome. The aim of this study was to evaluate the EEG characteristics of ADHD subtypes.  Method: Subjects included 61 boys (7-12 years old, normal intelligence) with ADHD (ADHD-I, N= 25; ADHD-H, N=14 and ADHD-C, N=22) and 43 typically developing children (TDC). The groups were matched for IQ- and age. Children were investigated regarding Child Behavior Checklist and brain electrical activity during eyes closed resting state (i.e. EEG power in delta (1-4 Hz), Theta (4-8 Hz), alpha (8-12 Hz) and Beta (12-30Hz) frequency bands. Statistical analysis included a 2x2 factorial design by additive model.  Results: Theta / beta ratio was higher in all ADHD subtypes, especially the ADHD-I subtypes, compared to normal children. In addition, in the ADHD-I subtypes, theta activity was higher and beta activity was lower. No significant difference was found between the groups in delta and alpha activity. Conclusion: According to this results, EEG markers can better distinguish the ADHD-I subtype, which can be explained within the framework of the maturational lag model of the central nervous system.
Type of Study: Research |
Received: 2019/05/6 | Accepted: 2019/07/4

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