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Cortical differences in preliterate children at familiar risk of dyslexia are similar to those observed in dyslexic readers
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Kraft, Indra, Cafiero, Riccardo, Schaadt, Gesa, Brauer, Jens, Neef, Nicole E., Müller, Bent, Kirsten, Holger, Wilcke, Arndt, Boltze, Johannes, Friederici, Angela D. and Skeide, Michael A. (2015) Cortical differences in preliterate children at familiar risk of dyslexia are similar to those observed in dyslexic readers. Brain, 138 (9). e378-e378. doi:10.1093/brain/awv036 ISSN 0006-8950.
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Official URL: http://dx.doi.org/10.1093/brain/awv036
Abstract
Sir, In their recent report in Brain, Clark et al. (2014) presented cortical thickness data obtained from a cohort of 27 children that were compared longitudinally at three time points (first grade: ages 6–7, third grade: ages 8–9, sixth grade: ages 11–12) categorized as either dyslexic or not according to their reading outcome in sixth grade. Based on their observations, the authors conclude that the neuroanatomical precursors of developmental dyslexia are found predominantly in primary sensory cortices and that structural abnormalities in the reading network only emerge after children have learned how to read and write. This study is indeed invaluable as it follows preliterate children longitudinally until the disorder is diagnosed, providing a unique picture of structural cortical changes in dyslexic and non-dyslexic children during this time. However, there are a number of discrepancies between the presented findings and results from other groups including our own. These differences might be explained by the relatively low statistical power of the analyses carried out by Clark and colleagues. Moreover, because genetic and environmental factors are not included in their analyses, it remains unclear how the data can be integrated into a comprehensive account of developmental dyslexia.
| Item Type: | Journal Article | ||||||
|---|---|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||||
| Journal or Publication Title: | Brain | ||||||
| Publisher: | Oxford University Press | ||||||
| ISSN: | 0006-8950 | ||||||
| Official Date: | September 2015 | ||||||
| Dates: |
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| Volume: | 138 | ||||||
| Number: | 9 | ||||||
| Page Range: | e378-e378 | ||||||
| DOI: | 10.1093/brain/awv036 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Restricted or Subscription Access |
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