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Predicting early signs of dyslexia at a preliterate age by combining behavioral assessment with structural MRI
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Kraft, Indra, Schreiber, Jan, Cafiero, Riccardo, Metere, Riccardo, Schaadt, Gesa, Brauer, Jens, Neef, Nicole E., Müller, Bent, Kirsten, Holger, Wilcke, Arndt, Boltze, Johannes, Friederici, Angela D. and Skeide, Michael A. (2016) Predicting early signs of dyslexia at a preliterate age by combining behavioral assessment with structural MRI. NeuroImage, 143 . pp. 378-386. doi:10.1016/j.neuroimage.2016.09.004 ISSN 1053-8119.
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Official URL: http://dx.doi.org/10.1016/j.neuroimage.2016.09.004
Abstract
Background
Recent studies suggest that neurobiological anomalies are already detectable in pre-school children with a family history of developmental dyslexia (DD). However, there is a lack of longitudinal studies showing a direct link between those differences at a preliterate age and the subsequent literacy difficulties seen in school. It is also not clear whether the prediction of DD in pre-school children can be significantly improved when considering neurobiological predictors, compared to models based on behavioral literacy precursors only.
Methods
We recruited 53 pre-reading children either with (N=25) or without a family risk of DD (N=28). Quantitative T1 MNI data and literacy precursor abilities were assessed at kindergarten age. A subsample of 35 children was tested for literacy skills either one or two years later, that is, either in first or second grade.
Results
The group comparison of quantitative T1 measures revealed significantly higher T1 intensities in the left anterior arcuate fascicle (AF), suggesting reduced myelin concentration in preliterate children at risk of DD. A logistic regression showed that DD can be predicted significantly better (p=.024) when neuroanatomical differences between groups are used as predictors (80%) compared to a model based on behavioral predictors only (63%). The Wald statistic confirmed that the T1 intensity of the left AF is a statistically significant predictor of DD (p<.05).
Conclusions
Our longitudinal results provide evidence for the hypothesis that neuroanatomical anomalies in children with a family risk of DD are related to subsequent problems in acquiring literacy. Particularly, solid white matter organization in the left anterior arcuate fascicle seems to play a pivotal role.
| Item Type: | Journal Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||||||
| Journal or Publication Title: | NeuroImage | ||||||||
| Publisher: | Elsevier | ||||||||
| ISSN: | 1053-8119 | ||||||||
| Official Date: | December 2016 | ||||||||
| Dates: |
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| Volume: | 143 | ||||||||
| Page Range: | pp. 378-386 | ||||||||
| DOI: | 10.1016/j.neuroimage.2016.09.004 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access |
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