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Auditory Attraction: Activation of visual cortex by music and sound in Williams syndrome
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Functional neuroanatomy of executive processes involved in dual-task performance
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The Cerebellum's Role in Reading: A Functional MR Imaging Study
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In: AJNR Am J Neuroradiol (1999)
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Functional disruption in the organization of the brain for reading in dyslexia
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Shaywitz, Sally E.; Shaywitz, Bennett A.; Pugh, Kenneth R.; Fulbright, Robert K.; Constable, R. Todd; Mencl, W. Einar; Shankweiler, Donald P.; Liberman, Alvin M.; Skudlarski, Pawel; Fletcher, Jack M.; Katz, Leonard; Marchione, Karen E.; Lacadie, Cheryl; Gatenby, Christopher; Gore, John C.. - : The National Academy of Sciences, 1998
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Abstract:
Learning to read requires an awareness that spoken words can be decomposed into the phonologic constituents that the alphabetic characters represent. Such phonologic awareness is characteristically lacking in dyslexic readers who, therefore, have difficulty mapping the alphabetic characters onto the spoken word. To find the location and extent of the functional disruption in neural systems that underlies this impairment, we used functional magnetic resonance imaging to compare brain activation patterns in dyslexic and nonimpaired subjects as they performed tasks that made progressively greater demands on phonologic analysis. Brain activation patterns differed significantly between the groups with dyslexic readers showing relative underactivation in posterior regions (Wernicke’s area, the angular gyrus, and striate cortex) and relative overactivation in an anterior region (inferior frontal gyrus). These results support a conclusion that the impairment in dyslexia is phonologic in nature and that these brain activation patterns may provide a neural signature for this impairment.
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Keyword:
Biological Sciences
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URL: http://www.ncbi.nlm.nih.gov/pubmed/9482939 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC19444
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Differential Sensitivity of Human Visual Cortex to Faces, Letterstrings, and Textures: A Functional Magnetic Resonance Imaging Study
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