A1 Journal article (refereed)
Children at risk for dyslexia show deficient left-hemispheric memory representations for new spoken word forms (2021)
Nora, A., Renvall, H., Ronimus, M., Kere, J., Lyytinen, H., & Salmelin, R. (2021). Children at risk for dyslexia show deficient left-hemispheric memory representations for new spoken word forms. NeuroImage, 229, Article 117739. https://doi.org/10.1016/j.neuroimage.2021.117739
JYU authors or editors
Publication details
All authors or editors: Nora, A.; Renvall, H; Ronimus, M.; Kere, J.; Lyytinen, Heikki; Salmelin, R.
Journal or series: NeuroImage
ISSN: 1053-8119
eISSN: 1095-9572
Publication year: 2021
Volume: 229
Article number: 117739
Publisher: Elsevier BV
Publication country: Netherlands
Publication language: English
DOI: https://doi.org/10.1016/j.neuroimage.2021.117739
Publication open access: Openly available
Publication channel open access: Open Access channel
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/73908
Abstract
Developmental dyslexia is a specific learning disorder with impairments in reading and spelling acquisition. Apart from literacy problems, dyslexics show inefficient speech encoding and deficient novel word learning, with underlying problems in phonological processing and learning. These problems have been suggested to be related to deficient specialization of the left hemisphere for language processing. To examine this possibility, we tracked with magnetoencephalography (MEG) the activation of the bilateral temporal cortices during formation of neural memory traces for new spoken word forms in 7-8-year-old children with high familial dyslexia risk and in controls. The at-risk children improved equally to their peers in overt repetition of recurring new word forms, but were poorer in explicit recognition of the recurring word forms. Both groups showed reduced activation for the recurring word forms 400–1200 ms after word onset in the right auditory cortex, replicating the results of our previous study on typically developing children (Nora et al, 2017, Children show right-lateralized effects of spoken word-form learning. PLoS ONE 12(2): e0171034). However, only the control group consistently showed a similar reduction of activation for recurring word forms in the left temporal areas. The results highlight the importance of left-hemispheric phonological processing for efficient phonological representations and its disruption in dyslexia.
Keywords: dyslexia; language development; language acquisition; phonological awareness; memory (cognition); MEG
Free keywords: dyslexia; reading acquisition; phonological learning; magnetoencephalography
Contributing organizations
Ministry reporting: Yes
Reporting Year: 2021
JUFO rating: 2