A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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-tekijät tai -toimittajat


Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Nora, A.; Renvall, H; Ronimus, M.; Kere, J.; Lyytinen, Heikki; Salmelin, R.

Lehti tai sarja: NeuroImage

ISSN: 1053-8119

eISSN: 1095-9572

Julkaisuvuosi: 2021

Volyymi: 229

Artikkelinumero: 117739

Kustantaja: Elsevier BV

Julkaisumaa: Alankomaat

Julkaisun kieli: englanti

DOI: https://doi.org/10.1016/j.neuroimage.2021.117739

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Kokonaan avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/73908


Tiivistelmä

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.


YSO-asiasanat: dysleksia; kielellinen kehitys; kielen omaksuminen; fonologinen tietoisuus; muisti (kognitio); MEG

Vapaat asiasanat: dyslexia; reading acquisition; phonological learning; magnetoencephalography


Liittyvät organisaatiot

JYU-yksiköt:


OKM-raportointi: Kyllä

Raportointivuosi: 2021

Alustava JUFO-taso: 2


Viimeisin päivitys 2021-17-09 klo 16:40