EEG-based diagnostics of the auditory system using cochlear implant electrodes as sensors

Abstract The cochlear implant is one of the most successful medical prostheses, allowing deaf and severely hearing-impaired persons to hear again by electrically stimulating the auditory nerve. A trained audiologist adjusts the stimulation settings for good speech understanding, known as “fitting” t...

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Autores principales:	Ben Somers, Christopher J. Long, Tom Francart
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/dbc849250f8840aca602468ced1c8fe0
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spelling	oai:doaj.org-article:dbc849250f8840aca602468ced1c8fe02021-12-02T13:20:01ZEEG-based diagnostics of the auditory system using cochlear implant electrodes as sensors10.1038/s41598-021-84829-y2045-2322https://doaj.org/article/dbc849250f8840aca602468ced1c8fe02021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-84829-yhttps://doaj.org/toc/2045-2322Abstract The cochlear implant is one of the most successful medical prostheses, allowing deaf and severely hearing-impaired persons to hear again by electrically stimulating the auditory nerve. A trained audiologist adjusts the stimulation settings for good speech understanding, known as “fitting” the implant. This process is based on subjective feedback from the user, making it time-consuming and challenging, especially in paediatric or communication-impaired populations. Furthermore, fittings only happen during infrequent sessions at a clinic, and therefore cannot take into account variable factors that affect the user’s hearing, such as physiological changes and different listening environments. Objective audiometry, in which brain responses evoked by auditory stimulation are collected and analysed, removes the need for active patient participation. However, recording of brain responses still requires expensive equipment that is cumbersome to use. An elegant solution is to record the neural signals using the implant itself. We demonstrate for the first time the recording of continuous electroencephalographic (EEG) signals from the implanted intracochlear electrode array in human subjects, using auditory evoked potentials originating from different brain regions. This was done using a temporary recording set-up with a percutaneous connector used for research purposes. Furthermore, we show that the response morphologies and amplitudes depend crucially on the recording electrode configuration. The integration of an EEG system into cochlear implants paves the way towards chronic neuro-monitoring of hearing-impaired patients in their everyday environment, and neuro-steered hearing prostheses, which can autonomously adjust their output based on neural feedback.Ben SomersChristopher J. LongTom FrancartNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ben Somers Christopher J. Long Tom Francart EEG-based diagnostics of the auditory system using cochlear implant electrodes as sensors
description	Abstract The cochlear implant is one of the most successful medical prostheses, allowing deaf and severely hearing-impaired persons to hear again by electrically stimulating the auditory nerve. A trained audiologist adjusts the stimulation settings for good speech understanding, known as “fitting” the implant. This process is based on subjective feedback from the user, making it time-consuming and challenging, especially in paediatric or communication-impaired populations. Furthermore, fittings only happen during infrequent sessions at a clinic, and therefore cannot take into account variable factors that affect the user’s hearing, such as physiological changes and different listening environments. Objective audiometry, in which brain responses evoked by auditory stimulation are collected and analysed, removes the need for active patient participation. However, recording of brain responses still requires expensive equipment that is cumbersome to use. An elegant solution is to record the neural signals using the implant itself. We demonstrate for the first time the recording of continuous electroencephalographic (EEG) signals from the implanted intracochlear electrode array in human subjects, using auditory evoked potentials originating from different brain regions. This was done using a temporary recording set-up with a percutaneous connector used for research purposes. Furthermore, we show that the response morphologies and amplitudes depend crucially on the recording electrode configuration. The integration of an EEG system into cochlear implants paves the way towards chronic neuro-monitoring of hearing-impaired patients in their everyday environment, and neuro-steered hearing prostheses, which can autonomously adjust their output based on neural feedback.
format	article
author	Ben Somers Christopher J. Long Tom Francart
author_facet	Ben Somers Christopher J. Long Tom Francart
author_sort	Ben Somers
title	EEG-based diagnostics of the auditory system using cochlear implant electrodes as sensors
title_short	EEG-based diagnostics of the auditory system using cochlear implant electrodes as sensors
title_full	EEG-based diagnostics of the auditory system using cochlear implant electrodes as sensors
title_fullStr	EEG-based diagnostics of the auditory system using cochlear implant electrodes as sensors
title_full_unstemmed	EEG-based diagnostics of the auditory system using cochlear implant electrodes as sensors
title_sort	eeg-based diagnostics of the auditory system using cochlear implant electrodes as sensors
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/dbc849250f8840aca602468ced1c8fe0
work_keys_str_mv	AT bensomers eegbaseddiagnosticsoftheauditorysystemusingcochlearimplantelectrodesassensors AT christopherjlong eegbaseddiagnosticsoftheauditorysystemusingcochlearimplantelectrodesassensors AT tomfrancart eegbaseddiagnosticsoftheauditorysystemusingcochlearimplantelectrodesassensors
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EEG-based diagnostics of the auditory system using cochlear implant electrodes as sensors

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