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Auditory temporal processing ability and the development of speech, language and reading: implications for children with auditory neuropathy spectrum disorder
thesisposted on 2022-03-28, 13:19 authored by Aseel Al-Meqbel
Auditory Neuropathy Spectrum Disorder (ANSD) is classified by normal cochlear mechanical function but severely degraded neural synchrony. The auditory system relies on high levels of neural synchrony for processing timing (temporal) cues which are critical for speech perception (particularly in degraded conditions) and normal speech, language and reading development. Unlike most sensorineural hearing losses, speech perception ability in ANSD appears to be correlated with the magnitude of temporal disruption rather than spectral disruption (measured either through the pure tone audiogram or estimated by frequency-specific auditory brainstem responses; ABR). Because ANSD is mostly diagnosed in infants through newborn hearing screening programs, objective tests of temporal processing are needed. The current study focused on the development and evaluation of objective tests of temporal processing for children. Specifically, the aims of the present study were to: identify the likely types of disruptions that occur to speech perception, language and reading abilities in young children with abnormal temporal processing, and the magnitude of disruption that can affect these skills; develop and evaluate objective measures of temporal processing in normally hearing adults to provide sensitive measures of assessing different auditory temporal processing abilities; and evaluate the applicability of these objective measures to normally hearing children (aged 5-12) with normal speech, language and reading abilities and to normally hearing older adults with poor temporal processing abilities (aged 64-80 years). This study provides normative data for objective temporal processing measures, which ultimately can be used to evaluate temporal processing abilities in children with ANSD unable to provide behavioural responses. Because of the heterogeneous nature of the disorder and co-morbidity of other medical problems in this population, research in this area is limited. Nonetheless, developing a greater understanding of this problem is critical to improved management of children diagnosed with ANSD and other temporal deficits.
Table of Contents1. Review of the literature -- 2. Current state of knowledge -- 3. Auditory cortical temporal processing abilities in young adult -- 4. Cortical auditory temporal processing abilities in elderly listeners -- 5. Auditory cortical temporal processing abilities in shcool-aged children -- 6. Future direction and conclusions.
NotesTypescript. Includes bibliographical references
Awarding InstitutionMacquarie University
Degree TypeThesis PhD
DegreeThesis (PhD), Macquarie University, Faculty of Human Sciences, Linguistics Department
Department, Centre or SchoolDept. of Linguistics
Year of Award2011
Principal SupervisorCatherine McMahon
Additional Supervisor 1Linda Cupples
RightsCopyright Assel Al-Meqbel 2011. Copyright disclaimer: http://mq.edu.au/library/copyright Access to this thesis is restricted to Macquarie University staff and students. Staff and students of Macquarie University should contact email@example.com to organise access.
Extent1 online resource (xvii, 169 leaves, bound) ill
Former Identifiersmq:71746 http://hdl.handle.net/1959.14/1277661