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Auditory brainstem responses (ABR) in the aged

M Maurizi, G Altissimi, F Ottaviani

    Scandinavian Audiology
    |January 1, 1982
    PubMed
    Summary
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    Aging significantly impacts hearing, affecting both the ear and brainstem auditory pathways. Brainstem Response Audiometry (BRA) reveals age-related changes in auditory thresholds and neural signal processing.

    Area of Science:

    • Audiology
    • Neuroscience
    • Gerontology

    Background:

    • Age-related hearing loss (presbycusis) is a common sensory deficit in older adults.
    • Auditory system changes with age involve peripheral (cochlear) and central (brainstem) structures.
    • Brainstem Response Audiometry (BRA) is a valuable tool for assessing auditory pathway integrity.

    Purpose of the Study:

    • To investigate age-related changes in auditory function using pure-tone audiometry and BRA.
    • To correlate auditory thresholds with BRA parameters in older males.
    • To determine if age-related auditory changes extend beyond the peripheral auditory system.

    Main Methods:

    • 86 male subjects aged 60-86 underwent pure-tone audiometry, impedance tests, and BRA.
    • Subjects were grouped by age (60-65, 66-70, 71-75, 76-86) and auditory threshold (≤30 dB HL, 31-40 dB HL, 41-50 dB HL, ≥51 dB HL).

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  • 19 younger adults (28-42 years) served as controls.

    • Main Results:

    • Significant correlations were found between age and mean auditory threshold (P≤0.001).
    • Wave V latency and V-I interval in BRA significantly correlated with age (P≤0.001).
    • Wave V latency also correlated with mean pure-tone auditory thresholds (P≤0.001).

    Conclusions:

    • Age-related hearing loss involves changes in both peripheral auditory organs and central brainstem structures.
    • BRA reveals progressive lengthening of V-I interval and reduced ABR wave amplitudes with age.
    • These findings suggest that the auditory brainstem is affected by the aging process, impacting neural processing of sound.