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Dynamic Visual Acuity Results in Otolith Electrical Stimulation in Bilateral Vestibular Dysfunction

(1) Background. Patients with bilateral vestibular disease (BVD) experience oscillopsia with a detriment to visual acuity (VA). This VA is driven mainly by the VOR that has two components: rotational and translational. VA can be tested by using dynamic visual acuity (DVA) on a treadmill because both...

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Autores principales: Rodríguez-Montesdeoca, Isaura, de Miguel, Ángel Ramos, Falcón-González, Juan Carlos, Borkoski-Barreiro, Silvia, Benítez-Robaina, Susana, Guerra-Jimenez, Gloria, Pavone, Joana, Ramos-Macías, Angel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
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Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9573650/
https://www.ncbi.nlm.nih.gov/pubmed/36233574
http://dx.doi.org/10.3390/jcm11195706
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author Rodríguez-Montesdeoca, Isaura
de Miguel, Ángel Ramos
Falcón-González, Juan Carlos
Borkoski-Barreiro, Silvia
Benítez-Robaina, Susana
Guerra-Jimenez, Gloria
Pavone, Joana
Ramos-Macías, Angel
author_facet Rodríguez-Montesdeoca, Isaura
de Miguel, Ángel Ramos
Falcón-González, Juan Carlos
Borkoski-Barreiro, Silvia
Benítez-Robaina, Susana
Guerra-Jimenez, Gloria
Pavone, Joana
Ramos-Macías, Angel
author_sort Rodríguez-Montesdeoca, Isaura
collection PubMed
description (1) Background. Patients with bilateral vestibular disease (BVD) experience oscillopsia with a detriment to visual acuity (VA). This VA is driven mainly by the VOR that has two components: rotational and translational. VA can be tested by using dynamic visual acuity (DVA) on a treadmill because both systems are activated. The aim of this study is to compare VA before and after chronic electrical stimulation of the otolith organ. (2) Materials and Method. Five patients suffering from bilateral vestibular dysfunction (BVD), previously implanted with a new vestibular implant prototype, were included in this study with the aim to check VA with and without vestibular implant use (W and W/O) in static, 2 km/h and 4 km/h walking situations. DVAtreadmill was measured on a treadmill with a dynamic illegible E (DIE) test in static and dynamic conditions (while walking on the treadmill at 2 and 4 km/h). The DVA score was registered in a logarithm of the minimum angle of resolution (LogMAR) for each speed. In addition, every patient completed the oscillopsia severity questionnaire (OSQ) and video head impulse test (vHIT) before and after activation of the vestibular implant. (3) Results. The analysis shows a significant difference in OSQ scores and DVA with an improvement in dynamic conditions. Organized corrective saccades during the use of a vestibular implant with no changes in gain were also detected in the video head impulse tests (vHIT). (4) Conclusion. The vestibular implant with otolithic stimulation offers changes in the response of DVA, which makes this paper one of the first to address the possible restoration of it. It is not possible to rule out other contributing factors (presence of covert saccades, somatosensory system, …). More work seems necessary to understand the neurophysiological basis of these findings, but this implant is added as a therapeutic alternative for the improvement of oscillopsia.
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spelling pubmed-95736502022-10-17 Dynamic Visual Acuity Results in Otolith Electrical Stimulation in Bilateral Vestibular Dysfunction Rodríguez-Montesdeoca, Isaura de Miguel, Ángel Ramos Falcón-González, Juan Carlos Borkoski-Barreiro, Silvia Benítez-Robaina, Susana Guerra-Jimenez, Gloria Pavone, Joana Ramos-Macías, Angel J Clin Med Article (1) Background. Patients with bilateral vestibular disease (BVD) experience oscillopsia with a detriment to visual acuity (VA). This VA is driven mainly by the VOR that has two components: rotational and translational. VA can be tested by using dynamic visual acuity (DVA) on a treadmill because both systems are activated. The aim of this study is to compare VA before and after chronic electrical stimulation of the otolith organ. (2) Materials and Method. Five patients suffering from bilateral vestibular dysfunction (BVD), previously implanted with a new vestibular implant prototype, were included in this study with the aim to check VA with and without vestibular implant use (W and W/O) in static, 2 km/h and 4 km/h walking situations. DVAtreadmill was measured on a treadmill with a dynamic illegible E (DIE) test in static and dynamic conditions (while walking on the treadmill at 2 and 4 km/h). The DVA score was registered in a logarithm of the minimum angle of resolution (LogMAR) for each speed. In addition, every patient completed the oscillopsia severity questionnaire (OSQ) and video head impulse test (vHIT) before and after activation of the vestibular implant. (3) Results. The analysis shows a significant difference in OSQ scores and DVA with an improvement in dynamic conditions. Organized corrective saccades during the use of a vestibular implant with no changes in gain were also detected in the video head impulse tests (vHIT). (4) Conclusion. The vestibular implant with otolithic stimulation offers changes in the response of DVA, which makes this paper one of the first to address the possible restoration of it. It is not possible to rule out other contributing factors (presence of covert saccades, somatosensory system, …). More work seems necessary to understand the neurophysiological basis of these findings, but this implant is added as a therapeutic alternative for the improvement of oscillopsia. MDPI 2022-09-27 /pmc/articles/PMC9573650/ /pubmed/36233574 http://dx.doi.org/10.3390/jcm11195706 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Rodríguez-Montesdeoca, Isaura
de Miguel, Ángel Ramos
Falcón-González, Juan Carlos
Borkoski-Barreiro, Silvia
Benítez-Robaina, Susana
Guerra-Jimenez, Gloria
Pavone, Joana
Ramos-Macías, Angel
Dynamic Visual Acuity Results in Otolith Electrical Stimulation in Bilateral Vestibular Dysfunction
title Dynamic Visual Acuity Results in Otolith Electrical Stimulation in Bilateral Vestibular Dysfunction
title_full Dynamic Visual Acuity Results in Otolith Electrical Stimulation in Bilateral Vestibular Dysfunction
title_fullStr Dynamic Visual Acuity Results in Otolith Electrical Stimulation in Bilateral Vestibular Dysfunction
title_full_unstemmed Dynamic Visual Acuity Results in Otolith Electrical Stimulation in Bilateral Vestibular Dysfunction
title_short Dynamic Visual Acuity Results in Otolith Electrical Stimulation in Bilateral Vestibular Dysfunction
title_sort dynamic visual acuity results in otolith electrical stimulation in bilateral vestibular dysfunction
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9573650/
https://www.ncbi.nlm.nih.gov/pubmed/36233574
http://dx.doi.org/10.3390/jcm11195706
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