ELECTROCORTICAL FREQUENCIES IN HYPERACTIVE, LEARNING-DISABLED, MIXED, AND NORMAL-CHILDREN
- 1 January 1982
- journal article
- research article
- Vol. 17 (6) , 675-685
Abstract
Ten boys in each of 4 groups (hyperactive, learning-disabled, hyperactive/learning-disabled (mixed) and normal) were exposed to a complex visual search task. EEG were recorded at central and parietal sites, 1-s prestimulus and 1-s poststimulus onset, on 3 types of trials. the resulting wave forms, averaged over trials, were converted to the frequency domain via a fast Fourier transform and factored by principal components. Four components accounting for 87% of the variance were varimax-rotated. Analyses of variance of the component scores revealed that component 1 differentiated the 4 groups of boys. This component had highest loadings in frequencies from 16-20 Hz and secondary loading in frequencies from 7-10 Hz. This multifrequency component is sensitive to parameters deficient in hyperactive and learning-disabled children.This publication has 4 references indexed in Scilit:
- Developmental Equations Reflect Brain DysfunctionsScience, 1980
- Selective and Sustained Attention in Hyperactive, Learning-Disabled, and Normal BoysJournal of Nervous & Mental Disease, 1979
- Computer estimated alpha attenuation during problem solving in children with learning disabilitiesElectroencephalography and Clinical Neurophysiology, 1977
- Evoked Potentials in Hyperkinetic and Normal Children Under Certainty and Uncertainty: A Placebo and Methylphenidate StudyPsychophysiology, 1976