EEG differences between good and poor responders to methylphenidate in boys with the inattentive type of attention-deficit/hyperactivity disorder.
OBJECTIVE
This study investigated electroencephalographic (EEG) differences between good and poor responders to methylphenidate in boys with the Inattentive type of Attention-Deficit/Hyperactivity Disorder (ADHD).


METHODS
Twenty good and 15 poor responders to methylphenidate, based on the results of a continuous performance task, and 35 age- and sex-matched control subjects, participated in this study. EEG was recorded from 21 sites during an eyes-closed resting condition and Fourier transformed to provide estimates for total power, and absolute and relative power in the delta, theta, alpha and beta bands, and for the theta/alpha and theta/beta ratios.


RESULTS
EEG differences were found between the ADHD children and controls which were compatible with previous literature on the Inattentive type. Differences were also found between the good and poor responders to methylphenidate.


CONCLUSIONS
Good responders had EEG profiles that suggested that they were more cortically hypoaroused than poor responders.
Clarke
Adam R
AR
Brain and Behaviour Research Institute and Department of Psychology, University of Wollongong, 2522, Wollongong, Australia. adam_clarke@uow.edu.au
Barry
Robert J
RJ
McCarthy
Rory
R
Selikowitz
Mark
M
Croft
Rodney J
RJ
D000293:Adolescent; D000513:Alpha Rhythm; D001143:Arousal; D001289:Attention Deficit Disorder with Hyperactivity / Q000188:drug therapy* / Q000503:physiopathology*; D001611:Beta Rhythm; D000697:Central Nervous System Stimulants / Q000627:therapeutic use*; D002540:Cerebral Cortex / Q000503:physiopathology; D002648:Child; D003700:Delta Rhythm; D004569:Electroencephalography; D005583:Fourier Analysis; D006801:Humans; D008297:Male; D008774:Methylphenidate / Q000627:therapeutic use*; D013826:Theta Rhythm; D016896:Treatment Outcome
D000697:Central Nervous System Stimulants; D008774:Methylphenidate