Age Effects on Neural Representation and Perception of Silence Duration Cues in Speech.
Purpose: Degraded temporal processing associated with aging may be a contributing factor to older adults' hearing difficulties, especially in adverse listening environments. This degraded processing may affect the ability to distinguish between words based on temporal duration cues. The current stud...
| Publicado en: | Journal of Speech, Language & Hearing Research Vol. 62; no. 4S; pp. 1099 - 1117 |
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| Autores principales: | , , , , |
| Formato: | Artículo |
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American Speech-Language-Hearing Association
2019 Supplement
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=136212902&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 136212902 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 10924388 1SM jtl: Journal of Speech, Language & Hearing Research issn: 10924388 maglogo: N pubinfo: dt: 2019 Supplement vid: 62 iid: 4S pid: 42 pub: American Speech-Language-Hearing Association artinfo: ui: 136212902 10.1044/2018_JSLHR-H-ASCC7-18-0076 ppf: 1099 ppct: 18 formats: fmt: @attributes: type: P size: 1.4MB tig: atl: Age Effects on Neural Representation and Perception of Silence Duration Cues in Speech. aug: au: Roque, Lindsey Gaskins, Casey Gordon-Salant, Sandra Goupell, Matthew J. Anderson, Samira affil: Department of Hearing and Speech Sciences, University of Maryland, College Park Neuroscience and Cognitive Science Program, University of Maryland, College Park su: Aging Physiology Temporal lobe Silence Prompts (Psychology) Auditory evoked response Hearing disorders Speech perception Acoustic localization sug: subj: Aging Physiology Temporal lobe Silence Prompts (Psychology) Auditory evoked response Hearing disorders Speech perception Acoustic localization ab: Purpose: Degraded temporal processing associated with aging may be a contributing factor to older adults' hearing difficulties, especially in adverse listening environments. This degraded processing may affect the ability to distinguish between words based on temporal duration cues. The current study investigates the effects of aging and hearing loss on cortical and subcortical representation of temporal speech components and on the perception of silent interval duration cues in speech. Method: Identification functions for the words DISH and DITCH were obtained on a 7-step continuum of silence duration (0-60 ms) prior to the final fricative in participants who are younger with normal hearing (YNH), older with normal hearing (ONH), and older with hearing impairment (OHI). Frequency-following responses and cortical auditoryevoked potentials were recorded to the 2 end points of the continuum. Auditory brainstem responses to clicks were obtained to verify neural integrity and to compare group differences in auditory nerve function. A multiple linear regression analysis was conducted to determine the peripheral or central factors that contributed to perceptual performance. Results: ONH and OHI participants required longer silence durations to identify DITCH than did YNH participants. Frequency-following responses showed reduced phase locking and poorer morphology, and cortical auditoryevoked potentials showed prolonged latencies in ONH and OHI participants compared with YNH participants. No group differences were noted for auditory brainstem response Wave I amplitude or Wave V/I ratio. After accounting for the possible effects of hearing loss, linear regression analysis revealed that both midbrain and cortical processing contributed to the variance in the DISH-DITCH perceptual identification functions. Conclusions: These results suggest that age-related deficits in the ability to encode silence duration cues may be a contributing factor in degraded speech perception. In particular, degraded response morphology relates to performance on perceptual tasks based on silence duration contrasts between words. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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