RT Journal Article
SR Electronic
T1 Atypical beta-band effects in children with dyslexia in response to rhythmic audio-visual speech
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 2023.03.29.534542
DO 10.1101/2023.03.29.534542
A1 Mahmoud Keshavarzi
A1 Kanad Mandke
A1 Annabel Macfarlane
A1 Lyla Parvez
A1 Fiona Gabrielczyk
A1 Angela Wilson
A1 Usha Goswami
YR 2023
UL http://biorxiv.org/content/early/2023/03/30/2023.03.29.534542.abstract
AB Children with dyslexia are known to show impairments in perceiving speech rhythm, which impact their phonological development. Neural rhythmic speech studies have reported atypical delta phase in children with dyslexia, but beta band effects have not yet been studied. It is known that delta phase modulates the amplitude of the beta band response during rhythmic tasks via delta-beta phase-amplitude coupling (PAC). Accordingly, the atypical delta band effects reported for children with dyslexia may imply related atypical beta band effects. Here we analyse EEG data collected during a rhythmic speech paradigm from 51 children (21 typically-developing; 30 with dyslexia) who attended to a talking head repeating “ba” at 2Hz. Phase entrainment in the beta band, angular velocity in the beta band, power responses in the beta band and delta-beta PAC were assessed for each child and each group. Phase entrainment in the beta band was only significant for children without dyslexia. Children with dyslexia did not exhibit any phase consistency, and beta-band angular velocity was significantly faster compared to control children. Power in the beta band was significantly greater in the children with dyslexia. Delta-beta PAC was significant in both groups. The data are interpreted with respect to temporal sampling theory.Competing Interest StatementThe authors have declared no competing interest.