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Atypical cortical entrainment to speech in the right hemisphere underpins phonemic deficits in dyslexia467.23 kB
Accepted VersionCC BY-NC-ND V4.0, Open Access
Journal article
Atypical cortical entrainment to speech in the right hemisphere underpins phonemic deficits in dyslexia
NeuroImage, Vol.175, pp.70-79
2018
PMID: 29609008
Abstract
Developmental dyslexia is a multifaceted disorder of learning primarily manifested by difficulties in reading, spelling, and phonological processing. Neural studies suggest that phonological difficulties may reflect impairments in fundamental cortical oscillatory mechanisms. Here we examine cortical mechanisms in children (6–12 years of age) with or without dyslexia (utilising both age- and reading-level-matched controls) using electroencephalography (EEG). EEG data were recorded as participants listened to an audio-story. Novel electrophysiological measures of phonemic processing were derived by quantifying how well the EEG responses tracked phonetic features of speech. Our results provide, for the first time, evidence for impaired low-frequency cortical tracking to phonetic features during natural speech perception in dyslexia. Atypical phonological tracking was focused on the right hemisphere, and correlated with traditional psychometric measures of phonological skills used in diagnostic dyslexia assessments. Accordingly, the novel indices developed here may provide objective metrics to investigate language development and language impairment across languages.
•Children with dyslexia show atypical low-frequency cortical entrainment to speech.•Impaired entrainment was due to dyslexia and not to reduced reading experience.•Dyslexia both reduced and enhanced speech entrainment in right hemisphere locations.•The right hemisphere effects reflected impaired phoneme-level entrainment.•Impaired entrainment was significantly related to impaired phonological awareness.
Details
- Title
- Atypical cortical entrainment to speech in the right hemisphere underpins phonemic deficits in dyslexia
- Authors
- Giovanni M Di Liberto (Author) - Trinity College DublinVarghese Peter (Author) - Western Sydney UniversityMarina Kalashnikova (Author) - Western Sydney UniversityUsha Goswami (Author) - University of CambridgeDenis Burnham (Author) - Western Sydney UniversityEdmund C Lalor (Author) - Trinity College Dublin
- Publication details
- NeuroImage, Vol.175, pp.70-79
- Publisher
- Elsevier BV
- Date published
- 2018
- DOI
- 10.1016/j.neuroimage.2018.03.072
- ISSN
- 1095-9572; 1053-8119
- PMID
- 29609008
- Copyright note
- Copyright © 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
- Organisation Unit
- School of Social Sciences - Legacy; University of the Sunshine Coast, Queensland; School of Health - Psychology; School of Health and Behavioural Sciences - Legacy
- Language
- English
- Record Identifier
- 99518706502621
- Output Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web Of Science research areas
- Neuroimaging
- Neurosciences
- Radiology, Nuclear Medicine & Medical Imaging