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- W4232642602 abstract "This study investigated differences in EEG coherence measures between two groups of children with Attention-Deficit/Hyperactivity Disorder (AD/HD) – one with the more common EEG profile (increased theta), and a group with excess alpha activity as the dominant EEG abnormality.26 children (aged 9–13 years) with AD/HD were included in each of the excess-theta and excess-alpha groups, and were age- and sex-matched with 26 control subjects. EEG was recorded from 19 electrode sites during an eyes-closed resting condition. Wave-shape coherence was calculated for eight intrahemispheric and eight interhemispheric electrode pairs, for the delta, theta, alpha and beta bands.In comparison with the controls, the excess-theta AD/HD group had increased theta intrahemispheric coherences at short-medium inter-electrode distances. Frontally, the excess-theta AD/HD group had increased interhemispheric theta and reduced beta coherences. The excess-alpha group primarily showed increased slow wave (delta and theta) intrahemispheric coherence at short-medium inter-electrode distances, and reduced alpha coherence at longer inter-electrode distances, compared with controls. An increase in frontal interhemispheric theta coherence was also found.These results suggest that AD/HD children with excess alpha power have an underlying connectivity dysfunction in the frontal lobes, which is found in common with other subjects with the excess-theta EEG profile. However, a number of qualitative differences exist that could be associated with other aspects of the AD/HD diagnosis. The excess-alpha group appeared to have fewer frontal-lobe abnormalities than the excess-theta AD/HD group.This is the first study to investigate coherence in AD/HD children who have the atypical profile of increased alpha power in their EEG." @default.
- W4232642602 created "2022-05-12" @default.
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- W4232642602 date "2005-08-01" @default.
- W4232642602 modified "2023-09-26" @default.
- W4232642602 title "EEG coherence" @default.
- W4232642602 doi "https://doi.org/10.1016/j.ijpsycho.2005.04.001" @default.
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