Lateralisation of auditory processing in Down syndrome: A study of T-complex peaks Ta and Tb

Groen, Margriet Anna and Alku, Paavo and Bishop, Dorothy Vera Margaret (2008) Lateralisation of auditory processing in Down syndrome: A study of T-complex peaks Ta and Tb. Biological Psychology, 79 (2). pp. 148-157. ISSN 0301-0511

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Abstract

It has long been argued that abnormal cerebral lateralisation might underlie the language problems that characterise Down syndrome, but to date only behavioural evidence has been provided. We used the auditory event-related potentials Ta and Tb of the T-complex to investigate lateralised processing of speech (vowels) and non-speech (simple and complex tones) sounds in children with Down syndrome and age-matched typically developing children. We also explored associations with speech and language abilities. Although changes in the Ta and Tb in response to increases in stimulus complexity and ‘speechness’ were similar across group, the Tb peak was delayed in children with Down syndrome across conditions. In addition, marked differences in the patterns of lateralisation of Ta latency and Tb amplitude were observed in children with Down syndrome, in response to both speech and non-speech sounds. No associations were found between Ta and Tb characteristics and speech and language abilities in children with DS.

Item Type:
Journal Article
Journal or Publication Title:
Biological Psychology
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2800
Subjects:
ID Code:
130938
Deposited By:
Deposited On:
29 Jan 2019 15:35
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jan 2020 11:47