Dyslexia: cultural diversity and biological unity
Paulesu, Eraldo and Demonet, Jean Francois and Fazio, Ferruccio and McCrory, Eamon and Chanoine, Valerie and Brunswick, Nicola and Cappa, Stefano F. and Cossu, Giuseppe and Habib, Michel and Frith, C. D. and Frith, Uta (2001) Dyslexia: cultural diversity and biological unity. Science, 291 (5511). pp. 2165-2167. ISSN 0036-8075
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The recognition of dyslexia as a neurodevelopmental disorder has been hampered by the belief that it is not a specific diagnostic entity because it has variable and culture-specific manifestations. In line with this belief, we found that Italian dyslexics, using a shallow orthography which facilitates reading, performed better on reading tasks than did English and French dyslexics. However, all dyslexics were equally impaired relative to their controls on reading and phonological tasks. Positron emission tomography scans during explicit and implicit reading showed the same reduced activity in a region of the left hemisphere in dyslexics from all three countries, with the maximum peak in the middle temporal gyrus and additional peaks in the inferior and superior temporal gyri and middle occipital gyrus. We conclude that there is a universal neurocognitive basis for dyslexia and that differences in reading performance among dyslexics of different countries are due to different orthographies.
|Research Areas:||A. Middlesex University Schools and Centres > School of Science and Technology > Psychology|
|Deposited On:||27 Oct 2009 05:32|
|Last Modified:||09 Oct 2014 10:30|
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