Lateralized auditory brain function in children with normal reading ability and in children withdyslexia

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Abstract

We examined central auditory processing in typically- and atypically-developing readers. Concurrent EEG and MEG brain measurements were obtained from a group of 16 children with dyslexia aged 8–12 years, and a group of 16 age-matched children with normal reading ability. Auditory responses were elicited using 500 ms duration broadband noise. These responses were strongly lateralized in control children. Children with dyslexia showed significantly less lateralisation of auditory cortical functioning, and a different pattern of development of auditory lateralization with age. These results provide further evidence that the core neurophysiological deficit of dyslexia is a problem in the balance of auditory function between the two hemispheres.

Highlights

★ We examined central auditory processing in children with reading impairments. ★ Brain activity was measured with EEG and MEG. ★ Children with reading problems showed lower levels of cerebral lateralization. ★ Lateralization abnormalities were greatest in younger children. ★ An abnormal balance of hemispheric function may be a core problem of dyslexia.

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