Age-related changes in reading systems of dyslexic children
Article first published online: 19 APR 2007
Copyright © 2007 American Neurological Association
Annals of Neurology
Volume 61, Issue 4, pages 363–370, April 2007
How to Cite
Shaywitz, B. A., Skudlarski, P., Holahan, J. M., Marchione, K. E., Constable, R. T., Fulbright, R. K., Zelterman, D., Lacadie, C. and Shaywitz, S. E. (2007), Age-related changes in reading systems of dyslexic children. Ann Neurol., 61: 363–370. doi: 10.1002/ana.21093
- Issue published online: 24 APR 2007
- Article first published online: 19 APR 2007
- Manuscript Accepted: 10 JAN 2007
- Manuscript Revised: 9 JAN 2007
- Manuscript Received: 25 JUN 2006
- National Institute of Child Health and Human Development. Grant Numbers: P50 HD25802, RO1 HD46171
To examine age-related changes in the neural systems for reading in nonimpaired and dyslexic children and adolescents.
Functional magnetic resonance imaging was used to study age-related changes in the neural systems for reading in a cross-sectional sample of 232 right-handed children 7 to 18 years of age (113 dyslexic readers and 119 nonimpaired readers) as they read pseudowords.
In nonimpaired readers, systems in the left anterior lateral occipitotemporal area developed with age, whereas systems in the right superior and middle frontal regions decreased. In contrast, in dyslexic readers, systems in the left posterior medial occipitotemporal regions developed with age. Older nonimpaired readers were left lateralized in the anterior lateral occipitotemporal area; there was no difference in asymmetry between younger and older dyslexic readers.
These findings offer a possible neurobiological explanation for the differences in reading acquisition between dyslexic and nonimpaired readers and provide further evidence of the critical role of the left occipitotemporal region in the development of reading. Ann Neurol 2007;61:363–370