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Related Experiment Videos

Electric auditory brain-stem responses in nucleus multichannel cochlear implant users

A V Hodges1, R A Ruth, P R Lambert

  • 1Department of Otolaryngology, University of Miami, Fla.

Archives of Otolaryngology--Head & Neck Surgery
|October 1, 1994
PubMed
Summary

Electrically elicited auditory brain-stem response (EABR) thresholds correlate with psychophysical hearing thresholds in cochlear implant users. While EABR cannot replace behavioral testing, it may aid in setting cochlear implant devices in challenging cases.

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Area of Science:

  • Audiology
  • Neuroscience
  • Biomedical Engineering

Background:

  • Cochlear implant device setting relies on subjective patient feedback.
  • Electrically elicited auditory brain-stem response (EABR) is a potential objective measure for device programming.
  • Systematic examination of EABR's predictive value for subjective measures is needed.

Purpose of the Study:

  • To investigate the relationship between psychophysical perceptions and EABRs in cochlear implant users.
  • To assess the predictive value of EABR characteristics for subjective cochlear implant device settings.

Main Methods:

  • A correlational study comparing EABR characteristics with perceptual measures in 10 adult cochlear implant users.
  • EABR morphology, latency, and amplitude were recorded.

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  • Behavioral perceptions of threshold, most comfortable, and uncomfortable loudness levels were assessed.

    • Main Results:

    • A significant relationship was found between EABR thresholds and behavioral perceptual thresholds (r=0.89).
    • EABR thresholds showed strong predictive value for perceptual thresholds across subjects and electrode positions.
    • EABR wave latencies and amplitudes did not significantly correlate with any perceptual measures.

    Conclusions:

    • EABR thresholds are significantly related to perceptual thresholds in cochlear implant users.
    • While EABR cannot fully replace behavioral measurements for device setting, EABR thresholds can serve as a valuable starting point in difficult cases.