Electrocortical frequencies in hyperactive, learning-disabled, mixed, and normal children.

R A Dykman; P J Holcomb; D M Oglesby; P T Ackerman

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PubMed · 7104419

Electrocortical frequencies in hyperactive, learning-disabled, mixed, and normal children.

R A Dykman·P J Holcomb·D M Oglesby·P T Ackerman

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Abstract

Ten boys in each of four groups (hyperactive, learning-disabled, hyperactive/learning-disabled or mixed, and normal) were exposed to a complex visual search task. EEGs were recorded at central and parietal sites, 1-sec prestimulus and 1-sec poststimulus onset, on three 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 four groups of boys. This component had highest loadings in frequencies from 16 to 20 Hz and secondary loading in frequencies from 7 to 10 Hz. It was concluded that this multifrequency component is sensitive to parameters deficient in hyperactive and learning-disabled children.

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Attention Attention Deficit Disorder with Hyperactivity Cerebral Cortex Discrimination Learning Electroencephalography Evoked Potentials, Visual Form Perception Humans Learning Disabilities Visual Perception Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S.

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R A Dykman, P J Holcomb, D M Oglesby, P T Ackerman. 1982. Electrocortical frequencies in hyperactive, learning-disabled, mixed, and normal children.. https://pubmed.ncbi.nlm.nih.gov/7104419/

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