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Related Experiment Videos

Deep electrode insertion in cochlear implants: apical morphology, electrodes and speech perception results.

Ingeborg Hochmair1, Wolfgang Arnold, Peter Nopp

  • 1Medical Electronics, Innsbruck, Austria. ingeborg.hochmair@medel.com

Acta Oto-Laryngologica
|July 24, 2003
PubMed
Summary

Deep cochlear implant electrode insertion benefits speech perception. Stimulating the apex and distributing contacts improves understanding in quiet and noisy environments for hearing implant users.

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Area of Science:

  • Otolaryngology
  • Biomedical Engineering
  • Neuroscience

Background:

  • Deep electrode insertion in the human temporal bone's apical region is morphologically supported.
  • Electrical stimulation near the basilar membrane offers channel selectivity but requires higher currents.

Purpose of the Study:

  • To evaluate the effect of cochlear implant electrode insertion depth on speech perception.
  • To assess speech understanding with different electrode contact configurations and stimulation regions.

Main Methods:

  • A clinical study involving 10 users of the MED-EL COMBI 40+ implant.
  • Acute speech tests using selective stimulation of apical, middle, and basal cochlear regions.
  • Comparison of full-length vs. basal-concentrated electrode arrangements mimicking different insertion depths.

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Main Results:

  • Stimulation of the cochlear apical region significantly aids speech understanding.
  • Distributing electrode contacts along the entire cochlear length enhances speech perception in both quiet and noisy conditions.

Conclusions:

  • Deep electrode insertion and apical stimulation are beneficial for cochlear implant users.
  • Optimizing electrode contact distribution improves overall speech perception outcomes.