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All groups had left-sided asymmetry for the temporal bank and right-sided asymmetry for the parietal bank.The group with dyslexia had exaggerated asymmetries,owing to a significant shift of right planar tissue from the temporal to parietal bank.They also had a higher incidence of cerebral anomalies bilaterally(subjects with dyslexia,six of nine;relatives,two of 10;and controls,zero of 12).Qualitative assessment of high-resolution magnetic resonance images can reveal functionally relevant variations and anomalies in cerebral structure.Further refinement of these measurement techniques should improve the diagnosis,classification,and treatment of language disorders and other learning disabilities. |
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