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Auditory brainstem responses in the aged.

F Ottaviani1, M Maurizi, L D'Alatri

  • 1Institute of Otorhinolaryngology, Catholic University of Sacred Heart, Policlinico A. Gemelli, Rome, Italy.

Acta Oto-Laryngologica. Supplementum
|January 1, 1990
PubMed
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Auditory brainstem responses (ABR) in older adults with hearing loss (presbycusis) show latency increases primarily linked to hearing loss shape, not age itself. This finding helps differentiate auditory processing changes in aging.

Area of Science:

  • Audiology
  • Neuroscience
  • Gerontology

Background:

  • Presbycusis, or age-related hearing loss, affects auditory processing.
  • Auditory brainstem responses (ABR) are used to assess the auditory pathway.
  • Differentiating cochlear from retrocochlear involvement in presbycusis is clinically important.

Purpose of the Study:

  • To investigate the factors contributing to increased ABR latency in individuals with presbycusis.
  • To determine if age or the audiometric configuration of hearing loss is the primary driver of ABR latency changes.

Main Methods:

  • Evaluated auditory brainstem responses (ABR) in 74 aged subjects (60-80 years) with presbycusis.
  • Compared ABR results with normally-hearing elderly subjects and young subjects with cochlear hearing loss.

Related Experiment Videos

  • Analyzed the correlation between ABR latency and audiometric hearing loss shape.

    • Main Results:

    • Increased ABR latency in presbycusis was significantly correlated with the audiometric shape of hearing loss.
    • Age per se did not appear to be the main factor influencing ABR latency.
    • Findings suggest the hearing loss pattern is a stronger determinant of ABR changes than chronological age.

    Conclusions:

    • The observed increase in ABR latency in presbycusis is primarily related to the characteristics of the hearing loss.
    • Age-related auditory changes in presbycusis may be better explained by the degree and type of cochlear dysfunction than by aging alone.
    • This research aids in understanding the neurophysiological basis of hearing impairment in older adults.