Content area
Abstract
Linkage studies implicate loci on chromosomes 6 and 15 in reading disability.17 -19 Neurobiologic Studies A range of neurobiologic investigations using postmortem brain specimens,20 brain morphometry, functional brain imaging, and electrophysiology suggests that there are differences in the temporo-parieto-occipital brain regions between people with dyslexia and those who are not reading-impaired.21 ,22 Some studies suggest differences in the striate or extrastriate cortex,23 findings that coincide with those in a large body of literature describing anatomical lesions in posterior brain regions in acquired alexia, most prominently centered on the angular gyrus.24 Cognitive Influences Reading -- the process of extracting meaning from print -- involves both visual-perceptual and linguistic processes.