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Estimating Performance Using Tonotopic Measurements of Intracochlear Electrocochleography: Comparison of Lateral Wall and Perimodiolar Arrays.

Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery·2026
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Social Determinants of Health and Impact on Cochlear Implant Performance.

Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·2026
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Simultaneous multielectrode recordings along the human scala tympani: Evidence for level-dependent place coding.

Proceedings of the National Academy of Sciences of the United States of America·2026
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Large Language Models and Otolaryngology: A Review.

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Cochlear Implant Candidacy Support Tool Using Conjunctive Consolidation.

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Single-Sided Deafness and Cochlear Implant Utilization: Are Traditional Speech Performance Factors Associated With Usage in Adult Patients?

Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·2025

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Perimodiolar Electrode Locations Outperform Lateral Wall Arrays When Controlling for Cochlear Health and Speech

Amit Walia1, Matthew A Shew, Miriam Smetak

  • 1Department of Otolaryngology-Head and Neck Surgery, Washington University School of Medicine in St. Louis, St Louis, MO.

Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [And] European Academy of Otology and Neurotology
|December 19, 2025
PubMed
Summary
This summary is machine-generated.

Cochlear implant electrode position in the scala tympani significantly impacts speech perception. Tighter modiolar proximity and deeper insertion correlate with better outcomes, highlighting the importance of electrode placement for optimizing hearing results.

Keywords:
Angular insertion depthCochlear healthCochlear implantsElectrocochleographyElectrode positioningModiolar proximityPerimodiolar electrodesSpeech perception

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Area of Science:

  • Audiology
  • Neurosurgery
  • Biomedical Engineering

Background:

  • Speech perception in cochlear implant (CI) recipients is influenced by electrode position within the cochlea.
  • Understanding the relationship between electrode placement, cochlear health, and functional outcomes is crucial for improving CI performance.

Purpose of the Study:

  • To evaluate how variations in scala tympani (ST) electrode position affect speech-perception performance.
  • To control for cochlear health and stimulation strategy in assessing electrode position effects.

Main Methods:

  • Retrospective cohort study of 98 postlingually deafened adult CI recipients.
  • Assessed cochlear health via electrocochleography-total response (ECochG-TR).
  • Used CT scans to determine electrode modiolar proximity (wrapping factor, WF) and angular insertion depth (AID).

Main Results:

  • ECochG-TR strongly correlated with speech perception (CNC scores).
  • Tighter modiolar proximity (WF) and deeper insertion (AID) showed significant positive correlations with better CNC scores.
  • A multivariate model including ECochG-TR, WF, and AID significantly improved prediction of speech perception outcomes.

Conclusions:

  • Electrode position within the ST varies, impacting outcomes.
  • Perimodiolar electrodes with tighter modiolar proximity outperformed lateral wall electrodes when controlling for other factors.
  • Integrating electrode location and cochlear health metrics is essential for predicting and optimizing CI performance.