Focal EEG abnormalities might reflect neuropathological characteristics of pervasive developmental disorder and
Masao Kawatani1, Michio Hiratani, Hiroshi Kometani
1Department of Pediatrics, Faculty of Medical Sciences, University of Fukui, Fukui, Japan. kawatani@u-fukui.ac.jp
Insights
Electroencephalogram (EEG) abnormalities in frontopolar-frontal regions may help distinguish pervasive developmental disorder (PDD) from attention-deficit/hyperactivity disorder (AD/HD). Specific EEG patterns could aid in diagnosing these neurodevelopmental disorders.
Area of Science:
- Neuroscience
- Child Psychiatry
- Clinical Neurophysiology
Background:
- Pervasive developmental disorder (PDD) and attention-deficit/hyperactivity disorder (AD/HD) are neurodevelopmental conditions with overlapping symptoms.
- Neurophysiological differences, particularly in electroencephalograms (EEG), may help differentiate these disorders.
Purpose of the Study:
- To investigate and compare neurophysiological characteristics using EEG in children with PDD and AD/HD.
- To identify potential EEG biomarkers for distinguishing PDD with AD/HD from AD/HD alone.
Main Methods:
- A multivariate analysis was conducted on EEG data from 64 children with PDD and 22 children with AD/HD.
- EEG abnormalities, clinical symptoms, and intelligence levels were compared between the two groups.
- Logistic regression modeling was explored to identify diagnostic hallmarks.
Main Results:
- Paroxysmal discharges in frontopolar-frontal (Fp-F) regions and background EEG abnormalities were more prevalent in the PDD group.
- Paroxysmal discharges in central-temporal (C-T) regions were more common in the AD/HD group.
- Specific EEG patterns, including Fp-F and C-T discharges, showed potential for differentiating the conditions.
Conclusions:
- Distinct EEG abnormality patterns may help differentiate PDD from AD/HD.
- Combined EEG findings could serve as diagnostic markers for distinguishing PDD with AD/HD from AD/HD alone.
- Brain area dysfunction indicated by EEG abnormalities may correlate with clinical symptoms in PDD and AD/HD.
Abstract:
Neurophysiological characteristics in electroencephalograms (EEG) were investigated for patients with pervasive developmental disorder (PDD) and for patients with attention-deficit/hyperactivity disorder (AD/HD). This study examined 64 PDD children and 22 AD/HD children with no history of epilepsy or progressive neurological or psychiatric disorder. We used multivariate analysis to compare EEG abnormalities, clinical symptoms, and intelligence levels between PDD and AD/AD patient groups. Paroxysmal discharges at the frontopolar-frontal (Fp-F) brain regions and background EEG abnormalities tended to be detected preferentially in the PDD group, although paroxysmal discharges at central-temporal (C-T) regions tended to be detected preferentially in the AD/HD group. The paroxysmal discharges observed in patients expressing persistence and impulsivity are apparently localized respectively in the Fp-F and C-T regions. A combination of EEG abnormalities, including background EEG abnormalities and paroxysmal discharges at Fp-F and C-T regions, might be useful diagnostic hallmarks to distinguish PDD with AD/HD from AD/HD alone using a logistic regression model. The dysfunction of specific brain areas associated with EEG abnormalities might explain characteristics of clinical symptoms observed in PDD and AD/HD patients.
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