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Subclinical changes of auditory function in the aged.

A Quaranta1, I Salonna, G Longo

  • 1Audiology and Otology Center, Bari University, Italy.

Acta Oto-Laryngologica. Supplementum
|January 1, 1990
PubMed
Summary
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Aging can lead to subtle inner ear abnormalities affecting cochlear functions, even in individuals with normal hearing. These subclinical changes primarily impact the inner ear

Area of Science:

  • Audiology
  • Gerontology
  • Neuroscience

Background:

  • Age-related hearing changes can occur even in individuals with normal audiometric thresholds.
  • Subclinical auditory dysfunctions may precede clinically significant hearing loss.

Purpose of the Study:

  • To investigate subclinical auditory function in elderly normal-hearing individuals.
  • To identify the specific sites of auditory pathway dysfunction associated with aging.

Main Methods:

  • Utilized a comprehensive battery of audiological tests targeting cochlear, neural, and central auditory functions.
  • Included tests such as remote masking, brief tone audiometry, critical ratio, evoked otoacoustic emissions, tone decay, and acoustic reflex measures.

Main Results:

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  • Identified consistent subclinical abnormalities primarily localized to the inner ear's vibrating structures (cochlea).
  • Observed occasional involvement of sensory and/or neural elements in the auditory pathway.
  • Demonstrated that aging can induce these subtle changes even with normal hearing.

Conclusions:

  • Aging can induce subclinical cochlear abnormalities in normal-hearing elderly individuals.
  • These age-related changes predominantly affect the inner ear's mechanical functions.
  • Auditory system aging may involve subtle, localized dysfunctions not detected by standard hearing tests.