Children with dyslexia show cortical hyperactivation in response to increasing literacy processing demands
This fMRI study aimed to examine how differences in literacy processing demands may affect cortical activation patterns in 11- to 12-year-old children with dyslexia as compared to children with typical reading skills. 11 children with and 18 without dyslexia were assessed using a reading paradigm ba...
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doaj-1875abc57a7c46fcad8d2b30fb5bf1a62020-11-25T00:22:31ZengFrontiers Media S.A.Frontiers in Psychology1664-10782014-12-01510.3389/fpsyg.2014.01491116438Children with dyslexia show cortical hyperactivation in response to increasing literacy processing demandsFrøydis eMorken0Turid eHelland1Turid eHelland2Kenneth eHugdahl3Kenneth eHugdahl4Kenneth eHugdahl5Kenneth eHugdahl6Karsten eSpecht7Karsten eSpecht8University of BergenUniversity of BergenUiT The Arctic University of NorwayUniversity of BergenHaukeland University HospitalHaukeland University HospitalUniversity of BergenUniversity of BergenHaukeland University HospitalThis fMRI study aimed to examine how differences in literacy processing demands may affect cortical activation patterns in 11- to 12-year-old children with dyslexia as compared to children with typical reading skills. 11 children with and 18 without dyslexia were assessed using a reading paradigm based on different stages of literacy development. In the analyses, six regions showed an interaction effect between group and condition in a factorial ANOVA. These regions were selected as regions of interest for further analyses. Overall, the dyslexia group showed cortical hyperactivation compared to the typical group. The difference between the groups tended to increase with increasing processing demands. Differences in cortical activation were not reflected in in-scanner reading performance. The six regions further grouped into three patterns, which are discussed in terms of processing demands, compensatory mechanisms, orthography and contextual facilitation. We conclude that the observed hyperactivation is chiefly a result of compensatory activity, modulated by other factors.http://journal.frontiersin.org/Journal/10.3389/fpsyg.2014.01491/fullAttentionDyslexiareadingsentence processingorthographycompensatory mechanisms |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Frøydis eMorken Turid eHelland Turid eHelland Kenneth eHugdahl Kenneth eHugdahl Kenneth eHugdahl Kenneth eHugdahl Karsten eSpecht Karsten eSpecht |
spellingShingle |
Frøydis eMorken Turid eHelland Turid eHelland Kenneth eHugdahl Kenneth eHugdahl Kenneth eHugdahl Kenneth eHugdahl Karsten eSpecht Karsten eSpecht Children with dyslexia show cortical hyperactivation in response to increasing literacy processing demands Frontiers in Psychology Attention Dyslexia reading sentence processing orthography compensatory mechanisms |
author_facet |
Frøydis eMorken Turid eHelland Turid eHelland Kenneth eHugdahl Kenneth eHugdahl Kenneth eHugdahl Kenneth eHugdahl Karsten eSpecht Karsten eSpecht |
author_sort |
Frøydis eMorken |
title |
Children with dyslexia show cortical hyperactivation in response to increasing literacy processing demands |
title_short |
Children with dyslexia show cortical hyperactivation in response to increasing literacy processing demands |
title_full |
Children with dyslexia show cortical hyperactivation in response to increasing literacy processing demands |
title_fullStr |
Children with dyslexia show cortical hyperactivation in response to increasing literacy processing demands |
title_full_unstemmed |
Children with dyslexia show cortical hyperactivation in response to increasing literacy processing demands |
title_sort |
children with dyslexia show cortical hyperactivation in response to increasing literacy processing demands |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Psychology |
issn |
1664-1078 |
publishDate |
2014-12-01 |
description |
This fMRI study aimed to examine how differences in literacy processing demands may affect cortical activation patterns in 11- to 12-year-old children with dyslexia as compared to children with typical reading skills. 11 children with and 18 without dyslexia were assessed using a reading paradigm based on different stages of literacy development. In the analyses, six regions showed an interaction effect between group and condition in a factorial ANOVA. These regions were selected as regions of interest for further analyses. Overall, the dyslexia group showed cortical hyperactivation compared to the typical group. The difference between the groups tended to increase with increasing processing demands. Differences in cortical activation were not reflected in in-scanner reading performance. The six regions further grouped into three patterns, which are discussed in terms of processing demands, compensatory mechanisms, orthography and contextual facilitation. We conclude that the observed hyperactivation is chiefly a result of compensatory activity, modulated by other factors. |
topic |
Attention Dyslexia reading sentence processing orthography compensatory mechanisms |
url |
http://journal.frontiersin.org/Journal/10.3389/fpsyg.2014.01491/full |
work_keys_str_mv |
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