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- W2765767529 abstract "ABSTRACT Objective To understand the effect of peripheral hearing loss on the representation of speech in noise in the aging midbrain and cortex. Methods Subjects comprised 17 normal-hearing younger adults, 15 normal-hearing older adults and 14 hearing-impaired older adults. The midbrain response, measured with Frequency-Following Responses (FFRs), and the cortical response, measured with magnetoencephalography (MEG) responses, were recorded from subjects listening to speech in quiet and noise at varying signal to noise ratios (SNRs). Results Both groups of older listeners showed both weaker midbrain response amplitudes and overrepresentation of cortical responses compared to younger listeners. However, significant differences between the older groups were found in both midbrain-cortex relationships and in cortical processing durations, suggesting that hearing loss may alter reciprocal connections between lower and higher levels of the auditory pathway. Conclusions The paucity of differences in midbrain or cortical responses between the two older groups suggest that age-related temporal processing deficits may contribute to older adults’ communication difficulties beyond what might be predicted from peripheral hearing loss alone. Significance Clinical devices, such as hearing aids, should not ignore age-related temporal processing deficits in the design of algorithms to maximize user benefit. HIGHLIGHTS Mild sensorineural hearing loss does not appear to significantly exacerbate already appreciable age-related deficits in midbrain speech-in-noise encoding. Mild sensorineural hearing loss also does not appear to significantly exacerbate already appreciable age-related deficits in most measures of cortical speech-in-noise encoding. Central processing deficits caused by peripheral hearing loss in older adults are seen only in more subtle measures, including altered relationships between midbrain and cortex." @default.
- W2765767529 created "2017-11-10" @default.
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- W2765767529 date "2017-10-31" @default.
- W2765767529 modified "2023-09-27" @default.
- W2765767529 title "Representation of speech in noise in the aging midbrain and cortex: aging may dominate over hearing-loss" @default.
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- W2765767529 doi "https://doi.org/10.1101/212159" @default.
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