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Related Experiment Video

Updated: Sep 17, 2025

Author Spotlight: Advancements in Impedance Monitoring for Cochlear Implant Surgery

Author Spotlight: Advancements in Impedance Monitoring for Cochlear Implant Surgery

Published on: August 4, 2023

Evaluating Selective Apical Electrode Deactivation for Improving Cochlear Implant Outcomes.

Katelyn A Berg¹, Jack H Noble², Benoit M Dawant²

¹Department of Hearing and Speech Sciences, Vanderbilt University Medical Center, Nashville, TN, USA.

Trends in Hearing

|July 3, 2025

Summary

This summary is machine-generated.

Deactivating a cochlear implant electrode may improve sound perception for some users. While group results showed no change, individual adults experienced better pitch, speech, and music outcomes with this modification.

Keywords:

cochlear implant computerized tomography electrode deactivation music perception speech perception

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Last Updated: Sep 17, 2025

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Published on: August 4, 2023

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Author Spotlight: Optimizing EAS with Long Electrodes for Enhanced Cochlear Coverage and Hearing Preservation

Author Spotlight: Optimizing EAS with Long Electrodes for Enhanced Cochlear Coverage and Hearing Preservation

Published on: October 11, 2024

Area of Science:

Audiology
Neuroscience
Biomedical Engineering

Background:

Cochlear implants (CIs) aim to restore hearing by stimulating the auditory nerve.
Optimizing CI programming is crucial for improving speech and music perception.
Electrode deactivation strategies are explored to enhance frequency resolution.

Purpose of the Study:

To investigate the effects of deactivating the second most apical electrode on pitch perception, speech understanding in noise, and musical experiences in adult cochlear implant users.
To identify demographic and electrode placement factors influencing the benefits of selective electrode deactivation.

Main Methods:

A prospective, within-subject A-B-A-B study design was employed.
Twenty-one adult CI users compared their clinical map (all electrodes active) with a map deactivating the second most apical electrode.
Measures included pitch discrimination, speech in noise tests, and subjective ratings of music quality and enjoyment.

Main Results:

No significant group-level differences were observed between the two electrode configurations.
A notable percentage of individuals showed improvements in pitch discrimination (33.3%), speech perception in noise (43.3%), musical sound quality (50.0%), and musical enjoyment (40.0%).
Electrode position (outside scala tympani, smaller modiolus distance) and device manufacturer predicted individual benefit.

Conclusions:

Selective deactivation of the second most apical electrode may offer individualized benefits for specific adult cochlear implant users.
Factors such as electrode placement and patient demographics influence the potential advantages.
Clinicians may consider this strategy for patients reporting poor musical experiences or disengagement from music.