NDLI: The increase in theta/beta ratio on resting-state EEG in boys with attention-deficit/hyperactivity disorder is mediated by slow alpha peak frequency.

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The increase in theta/beta ratio on resting-state EEG in boys with attention-deficit/hyperactivity disorder is mediated by slow alpha peak frequency.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Lansbergen, Marieke M. Arns, Martijn Van Dongen-boomsma, Martine Spronk, Desirée Buitelaar, Jan K.
Description	Country affiliation: Netherlands Author Affiliation: Lansbergen MM ( Department of Psychiatry, Radboud University Nijmegen Medical Centre, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands. M.Lansbergen@psy.umcn.nl)
Abstract	Attention-deficit/hyperactivity disorder (ADHD) was found to be characterized by a deviant pattern of electrocortical activity during resting state, particularly increased theta and decreased beta activity. The first objective of the present study is to confirm whether individuals with slow alpha peak frequency contribute to the finding of increased theta activity in ADHD. The second objective is to explore the relation between resting-state brain oscillations and specific cognitive functions. From 49 boys with ADHD and 49 healthy control boys, resting-state EEG during eyes open and eyes closed was recorded, and a variety of cognitive tasks were administered. Theta and beta power and theta/beta ratio were calculated using both fixed frequency bands and individualized frequency bands. As expected, theta/beta ratio, calculated using fixed frequency bands, was significantly higher in ADHD children than control children. However, this group effect was not significant when theta/beta ratio was assessed using individualized frequency bands. No consistent relation was found between resting-state brain oscillations and cognition. The present results suggest that previous findings of increased theta/beta ratio in ADHD may reflect individuals with slow alpha peak frequencies in addition to individuals with true increased theta activity. Therefore, the often reported theta/beta ratio in ADHD can be considered a non-specific measure combining several distinct neurophysiological subgroups such as frontal theta and slowed alpha peak frequencies. Future research should elucidate the functional role of resting-state brain oscillations by investigating neurophysiological subgroups, which may have a clearer relation to cognitive functions than single frequency bands.
File Format	HTM / HTML
ISSN	02785846
Issue Number	1
Volume Number	35
e-ISSN	18784216
Journal	Progress in Neuro-Psychopharmacology and Biological Psychiatry
Language	English
Publisher	Elsevier
Publisher Date	2011-01-15
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Psychiatry Alpha Rhythm Physiology Attention Deficit Disorder With Hyperactivity Physiopathology Beta Rhythm Rest Theta Rhythm Adolescent Analysis Of Variance Child Electroencephalography Methods Electrooculography Humans Male Neuropsychological Tests Statistics As Topic Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Biological Psychiatry Pharmacology

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