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Related Experiment Videos

[Otoacoustic emissions evoked by electrical stimulation]

M Yoshida1, K Fujimura, K Makishima

  • 1Department of Otorhinolaryngology, University of Occupational and Environmental Health, School of Medicine, Kitakyushu.

Nihon Jibiinkoka Gakkai Kaiho
|February 18, 1998
PubMed
Summary

Electrically evoked otoacoustic emissions (EEOAEs) in guinea pigs show potential for assessing cochlear outer hair cell function. EEOAE amplitude correlated with stimulus current and was sensitive to physiological changes.

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Area of Science:

  • Otoacoustic Emissions
  • Auditory Electrophysiology
  • Cochlear Mechanics

Context:

  • Otoacoustic emissions (OAEs) are crucial indicators of outer hair cell (OHC) function in the cochlea.
  • Electrical stimulation offers a direct method to probe cochlear activity.
  • Understanding OHC electromotility is key to diagnosing hearing impairments.

Purpose:

  • To investigate the characteristics of otoacoustic emissions evoked by direct electrical stimulation of the cochlea (EEOAEs) in guinea pigs.
  • To assess the feasibility of EEOAE measurement as a diagnostic tool for cochlear function.

Summary:

  • Alternating current stimuli were applied to the basal turn of guinea pig cochleae, evoking measurable EEOAEs.
  • EEOAE amplitude showed a linear relationship with stimulus current and decreased with anoxia or ossicular removal.

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  • EEOAEs exhibited a rapid onset and decay, with peak amplitude varying across tested frequencies (1-6 kHz).

    • Impact:

    • EEOAE measurement provides a potentially simple and stable in vivo method for evaluating OHC electromotility.
    • This technique could offer a novel approach for assessing cochlear health and diagnosing hearing disorders.
    • Findings contribute to understanding the electro-mechanical coupling within the cochlea.