OBJECTIVE: Electrical stimulation of the utricular and saccular portions of the vestibular nerve improves stability in patients suffering from vestibular dysfunction. The main objective of this study was to evaluate a new technique, vestibular response telemetry (VRT), for measuring the electrically evoked vestibular compound action potential (saccular and utricular) after stimulating the otolith organ (saccular and utricular) in adults. This study used evidence that the otolith organ can be electrically stimulated in order to develop a new vestibular implant design to improve the sensation of gravitoinertial acceleration. MATERIALS AND METHODS: Four adult patients were evaluated by using a variety of measurement procedures with novel VRT software. VRT values were obtained by stimulating with three full-band Nucleus CI24RE (ST) electrodes. Specific stimuli were used. Simultaneously, electrical ocular vestibular evoked myogenic potentials (eoVEMPs) were recorded in the contralateral side. RESULTS: Electrically evoked compound action potentials were obtained in 10 of the 12 electrodes tested, and eoVEMPs were recorded when VRT was present. In addition to the validation of this technique, a set of default clinical test parameters was established. The VRT response morphology consisted of a biphasic waveform with an initial negative peak (N1) followed by a positive peak (P1), and latencies were typically 400 μs for N1 and 800 μs for P1. The consequences for the development of a vestibular implant for the improvement of gravitoinertial acceleration sensation are also presented. CONCLUSION: The VRT measurement technique has been shown to be a useful tool to record neural response on the otolith organ, and thus it is a convenient tool to evaluate whether the implanted electrodes provide a neural response or not. This can be used for the early development of vestibular implants to improve gravitoinertial acceleration sensation.
OBJECTIVE: Electrical stimulation of the utricular and saccular portions of the vestibular nerve improves stability in patients suffering from vestibular dysfunction. The main objective of this study was to evaluate a new technique, vestibular response telemetry (VRT), for measuring the electrically evoked vestibular compound action potential (saccular and utricular) after stimulating the otolith organ (saccular and utricular) in adults. This study used evidence that the otolith organ can be electrically stimulated in order to develop a new vestibular implant design to improve the sensation of gravitoinertial acceleration. MATERIALS AND METHODS: Four adult patients were evaluated by using a variety of measurement procedures with novel VRT software. VRT values were obtained by stimulating with three full-band Nucleus CI24RE (ST) electrodes. Specific stimuli were used. Simultaneously, electrical ocular vestibular evoked myogenic potentials (eoVEMPs) were recorded in the contralateral side. RESULTS: Electrically evoked compound action potentials were obtained in 10 of the 12 electrodes tested, and eoVEMPs were recorded when VRT was present. In addition to the validation of this technique, a set of default clinical test parameters was established. The VRT response morphology consisted of a biphasic waveform with an initial negative peak (N1) followed by a positive peak (P1), and latencies were typically 400 μs for N1 and 800 μs for P1. The consequences for the development of a vestibular implant for the improvement of gravitoinertial acceleration sensation are also presented. CONCLUSION: The VRT measurement technique has been shown to be a useful tool to record neural response on the otolith organ, and thus it is a convenient tool to evaluate whether the implanted electrodes provide a neural response or not. This can be used for the early development of vestibular implants to improve gravitoinertial acceleration sensation.
Authors: Lisa van Stiphout; Israt Hossein; Merel Kimman; Susan L Whitney; Andrianna Ayiotis; Michael Strupp; Nils Guinand; Angélica Pérez Fornos; Josine Widdershoven; Ángel Ramos-Macías; Vincent Van Rompaey; Raymond van de Berg Journal: Front Neurol Date: 2022-03-17 Impact factor: 4.003
Authors: Lisa van Stiphout; Maksim Pleshkov; Florence Lucieer; Bieke Dobbels; Vergil Mavrodiev; Nils Guinand; Angelica Pérez Fornos; Josine Widdershoven; Michael Strupp; Vincent Van Rompaey; Raymond van de Berg Journal: Front Neurol Date: 2022-03-21 Impact factor: 4.003
Authors: Kristin N Hageman; Margaret R Chow; Dale Roberts; Peter J Boutros; Angela Tooker; Kye Lee; Sarah Felix; Satinderpall S Pannu; Razi Haque; Charles C Della Santina Journal: J Neurophysiol Date: 2019-11-20 Impact factor: 2.974
Authors: Raymond van de Berg; Angel Ramos; Vincent van Rompaey; Alexandre Bisdorff; Angelica Perez-Fornos; Jay T Rubinstein; James O Phillips; Michael Strupp; Charles C Della Santina; Nils Guinand Journal: J Vestib Res Date: 2020 Impact factor: 2.354