Paper Info
Title
Atypical right hemisphere response to slow temporal modulations in children with developmental dyslexia.
Abstract
Phase entrainment of neuronal oscillations is thought to play a central role in encoding speech. Children with developmental dyslexia show impaired phonological processing of speech, proposed theoretically to be related to atypical phase entrainment to slower temporal modulations in speech (<10Hz). While studies of children with dyslexia have found atypical phase entrainment in the delta band (~2Hz), some studies of adults with developmental dyslexia have shown impaired entrainment in the low gamma band (~35–50Hz). Meanwhile, studies of neurotypical adults suggest asymmetric temporal sensitivity in auditory cortex, with preferential processing of slower modulations by right auditory cortex, and faster modulations processed bilaterally. Here we compared neural entrainment to slow (2Hz) versus faster (40Hz) amplitude-modulated noise using fNIRS to study possible hemispheric asymmetry effects in children with developmental dyslexia. We predicted atypical right hemisphere responding to 2Hz modulations for the children with dyslexia in comparison to control children, but equivalent responding to 40Hz modulations in both hemispheres. Analyses of HbO concentration revealed a right-lateralised region focused on the supra-marginal gyrus that was more active in children with dyslexia than in control children for 2Hz stimulation. We discuss possible links to linguistic prosodic processing, and interpret the data with respect to a neural ‘temporal sampling’ framework for conceptualizing the phonological deficits that characterise children with developmental dyslexia across languages.
Year
DOI
Venue
2016
10.1016/j.neuroimage.2016.08.012
NeuroImage
Keywords
Field
DocType
fNIRs,Entrainment,Dyslexia,Phonology,Prosody
Prosody,Psychology,Cognitive psychology,Phonology,Right hemisphere,Dyslexia
Journal
Volume
ISSN
Citations 
143
1053-8119
2
PageRank 
References 
Authors
0.40
0
5
Name
Order
Citations
PageRank
Simone Cutini1655.94
Dénes Szucs291.40
Natasha Mead3122.18
Martina Huss4122.18
Usha Goswami5265.66