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Rehabilitation Practice and Science

Translated Title

閱讀障礙兒童大腦形態學的發現

Abstract

This article concerns the correlation between children with dyslexia and brain morphology. Computed tomography (CT) and magnetic resonance imaging (MRI) studies suggest that five major differences exist between dyslexic and typical children. Primarily, the genu of the corpus callosum is significant smaller in dyslexic children. Secondly, the corpus callosum in dyslexic children with family history is larger and thicker. Thirdly, dyslexics demonstrate more deviations from normal patterns of left and right hemisphere asymmetry. Fourthly, posterior superior surface of temporal lobe, planum temporal surface area and brain volume in left brain are smaller in dyslexics. Finally, six brain regions account for at least 60% percentage of the variance while discriminating dyslexia and other groups.The smaller genu of the corpus callosum reflects that brain damage might exist in dyslexia children. The thicker corpus callosum might imply the limited interaction between left and right hemis-phere. Symmetrical morphology between left and right hemisphere might result in poor lateralized behavior. Smaller areas or volumes in some regions of left brain in dyslexics might correlate to lang-uage limitations. The findings from CT and MRI studies are helpful to tell the relation between dyslexia and brain morphology. It also enhances neurobehavioral theories while addressing behavioral corre-lates of dyslexia and neurological basis.

Language

Traditional Chinese

First Page

125

Last Page

137

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