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Updated: Nov 14, 2025
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Performing Intracochlear Electrocochleography During Cochlear Implantation
Published on: March 8, 2022
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EEG-based diagnostics of the auditory system using cochlear implant electrodes as sensors
Ben Somers1, Christopher J Long2, Tom Francart3
1Department of Neurosciences, Research Group Experimental Oto-Rhino-Laryngology, KU Leuven, University of Leuven, Leuven, Belgium. ben.somers@med.kuleuven.be.
Scientific Reports
|March 9, 2021
Summary
Researchers recorded brain signals using cochlear implants, offering a new way to monitor hearing. This innovation could lead to hearing aids that adjust automatically based on neural feedback.
Area of Science:
- Biomedical Engineering
- Neuroscience
- Audiology
Background:
- Cochlear implants are successful prostheses for hearing loss.
- Current fitting methods rely on subjective user feedback, which is time-consuming and challenging.
- Objective audiometry requires specialized, cumbersome equipment.
Purpose of the Study:
- To demonstrate the feasibility of recording electroencephalographic (EEG) signals directly from within the cochlear implant.
- To explore the potential for real-time neural monitoring and adaptive hearing prostheses.
Main Methods:
- Recorded continuous EEG signals from intracochlear electrode arrays in human subjects.
- Utilized auditory evoked potentials from different brain regions.
- Employed a temporary research setup with a percutaneous connector.
Main Results:
- Successfully recorded continuous EEG signals using the cochlear implant's electrode array.
- Demonstrated that response characteristics depend on electrode configuration.
- Showed the potential for using neural signals for monitoring and device adjustment.
Conclusions:
- Recording neural signals via the cochlear implant is feasible.
- This technology enables chronic neuro-monitoring in daily environments.
- Paves the way for neuro-steered hearing prostheses that autonomously adapt.
