Altered gray matter development in pre-reading children with a family history of reading disorder.


Journal

Developmental science
ISSN: 1467-7687
Titre abrégé: Dev Sci
Pays: England
ID NLM: 9814574

Informations de publication

Date de publication:
03 2022
Historique:
revised: 07 07 2021
received: 09 04 2021
accepted: 09 07 2021
pubmed: 20 7 2021
medline: 8 3 2022
entrez: 19 7 2021
Statut: ppublish

Résumé

Reading disorders are common in children and can impact academic success, mental health, and career prospects. Reading is supported by network of interconnected left hemisphere brain regions, including temporo-parietal, occipito-temporal, and inferior-frontal circuits. Poor readers often show hypoactivation and reduced gray matter volumes in this reading network, with hyperactivation and increased volumes in the posterior right hemisphere. We assessed gray matter development longitudinally in pre-reading children aged 2-5 years using magnetic resonance imaging (MRI) (N = 32, 110 MRI scans; mean age: 4.40 ± 0.77 years), half of whom had a family history of reading disorder. The family history group showed slower proportional growth (relative to total brain volume) in the left supramarginal and inferior frontal gyri, and faster proportional growth in the right angular, right fusiform, and bilateral lingual gyri. This suggests delayed development of left hemisphere reading areas in children with a family history of dyslexia, along with faster growth in right homologues. This alternate development pattern may predispose the brain to later reading difficulties and may later manifest as the commonly noted compensatory mechanisms. The results of this study further shows our understanding of structural brain alterations that may form the neurological basis of reading difficulties.

Identifiants

pubmed: 34278658
doi: 10.1111/desc.13160
doi:

Types de publication

Journal Article Research Support, Non-U.S. Gov't

Langues

eng

Sous-ensembles de citation

IM

Pagination

e13160

Subventions

Organisme : CIHR
ID : IHD-134090
Pays : Canada
Organisme : CIHR
ID : MOP-136797
Pays : Canada
Organisme : CIHR
ID : MFE-164703
Pays : Canada

Informations de copyright

© 2021 John Wiley & Sons Ltd.

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Auteurs

Curtis Ostertag (C)

Department of Radiology, University of Calgary, Calgary, AB, Canada.
Owerko Centre, Alberta Children Hospital Research Institute, University of Calgary, Calgary, AB, Canada.
Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada.

Jess E Reynolds (JE)

Department of Radiology, University of Calgary, Calgary, AB, Canada.
Owerko Centre, Alberta Children Hospital Research Institute, University of Calgary, Calgary, AB, Canada.
Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada.

Deborah Dewey (D)

Owerko Centre, Alberta Children Hospital Research Institute, University of Calgary, Calgary, AB, Canada.
Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada.
Department of Pediatrics, University of Calgary, Calgary, AB, Canada.
Department of Community Health Sciences, University of Calgary, Calgary, AB, Canada.

Bennett Landman (B)

Department of Electrical Engineering and Computer Science, Vanderbilt University, Nashville, Tennessee, USA.

Yuankai Huo (Y)

Department of Electrical Engineering and Computer Science, Vanderbilt University, Nashville, Tennessee, USA.

Catherine Lebel (C)

Department of Radiology, University of Calgary, Calgary, AB, Canada.
Owerko Centre, Alberta Children Hospital Research Institute, University of Calgary, Calgary, AB, Canada.
Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada.

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