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Central Auditory Changes Associated with Age-related Hearing Loss.

Selhan Gürkan1, Oğuz Başokçu2, Serpil Mungan Durankaya1

  • 1Vocational School of Health Services, Department of Audiometry, Dokuz Eylül University, İzmir, Turkey.

Clinical EEG and Neuroscience
|April 3, 2024
PubMed
Summary

Aging impacts cortical auditory evoked potentials (CAEPs), affecting latency and amplitude. High-frequency hearing loss and stimulus sensation level also significantly alter CAEPs in older adults.

Keywords:
CAEPsP1-N1-P2age-related hearing lossagingcortical auditory evoked potentials

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Area of Science:

  • Neuroscience
  • Audiology
  • Gerontology

Background:

  • Cortical auditory evoked potentials (CAEPs) are crucial for understanding auditory processing.
  • Age-related hearing decline and high-frequency hearing loss are prevalent in the elderly.
  • The influence of stimulus sensation level on CAEPs in aging populations requires further investigation.

Purpose of the Study:

  • To examine how aging, high-frequency hearing loss, and stimulus sensation level affect CAEPs in elderly individuals.
  • To identify specific associations between these factors and CAEP components (latency and amplitude).

Main Methods:

  • Analysis of electrophysiological and audiometric data from 71 elderly participants.
  • Application of multiple regression analysis to correlate CAEPs with aging, hearing loss, and stimulus sensation level.

Main Results:

  • Aging correlated with longer N1 and P2 latencies and decreased P2 amplitude.
  • Higher stimulus sensation levels were linked to increased N1/P2 amplitudes and shorter N1 latency.
  • High-frequency hearing thresholds showed a relationship with shorter P2 latencies and reduced P2 amplitudes.

Conclusions:

  • CAEPs in the elderly are complexly influenced by aging, high-frequency hearing loss, and stimulus sensation level.
  • These factors must be considered in future research on auditory processing in aging populations.
  • Understanding these interactions enhances diagnostic and therapeutic approaches for age-related auditory changes.