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Bilateral vestibulopathy and age: experimental considerations for testing dynamic visual acuity on a treadmill
INTRODUCTION: Bilateral vestibulopathy (BVP) can affect visual acuity in dynamic conditions, like walking. This can be assessed by testing Dynamic Visual Acuity (DVA) on a treadmill at different walking speeds. Apart from BVP, age itself might influence DVA and the ability to complete the test. The...
Autores principales: | , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer Berlin Heidelberg
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7718189/ https://www.ncbi.nlm.nih.gov/pubmed/33113022 http://dx.doi.org/10.1007/s00415-020-10249-z |
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author | Starkov, D. Snelders, M. Lucieer, F. Janssen, A. M. L. Pleshkov, M. Kingma, H. van Rompaey, V. Herssens, N. Hallemans, A. Vereeck, L. McCrum, C. Meijer, K. Guinand, N. Perez-Fornos, A. van de Berg, R. |
author_facet | Starkov, D. Snelders, M. Lucieer, F. Janssen, A. M. L. Pleshkov, M. Kingma, H. van Rompaey, V. Herssens, N. Hallemans, A. Vereeck, L. McCrum, C. Meijer, K. Guinand, N. Perez-Fornos, A. van de Berg, R. |
author_sort | Starkov, D. |
collection | PubMed |
description | INTRODUCTION: Bilateral vestibulopathy (BVP) can affect visual acuity in dynamic conditions, like walking. This can be assessed by testing Dynamic Visual Acuity (DVA) on a treadmill at different walking speeds. Apart from BVP, age itself might influence DVA and the ability to complete the test. The objective of this study was to investigate whether DVA tested while walking, and the drop-out rate (the inability to complete all walking speeds of the test) are significantly influenced by age in BVP-patients and healthy subjects. METHODS: Forty-four BVP-patients (20 male, mean age 59 years) and 63 healthy subjects (27 male, mean age 46 years) performed the DVA test on a treadmill at 0 (static condition), 2, 4 and 6 km/h (dynamic conditions). The dynamic visual acuity loss was calculated as the difference between visual acuity in the static condition and visual acuity in each walking condition. The dependency of the drop-out rate and dynamic visual acuity loss on BVP and age was investigated at all walking speeds, as well as the dependency of dynamic visual acuity loss on speed. RESULTS: Age and BVP significantly increased the drop-out rate (p ≤ 0.038). A significantly higher dynamic visual acuity loss was found at all speeds in BVP-patients compared to healthy subjects (p < 0.001). Age showed no effect on dynamic visual acuity loss in both groups. In BVP-patients, increasing walking speeds resulted in higher dynamic visual acuity loss (p ≤ 0.036). CONCLUSION: DVA tested while walking on a treadmill, is one of the few “close to reality” functional outcome measures of vestibular function in the vertical plane. It is able to demonstrate significant loss of DVA in bilateral vestibulopathy patients. However, since bilateral vestibulopathy and age significantly increase the drop-out rate at faster walking speeds, it is recommended to use age-matched controls. Furthermore, it could be considered to use an individual “preferred” walking speed and to limit maximum walking speed in older subjects when testing DVA on a treadmill. |
format | Online Article Text |
id | pubmed-7718189 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Springer Berlin Heidelberg |
record_format | MEDLINE/PubMed |
spelling | pubmed-77181892020-12-11 Bilateral vestibulopathy and age: experimental considerations for testing dynamic visual acuity on a treadmill Starkov, D. Snelders, M. Lucieer, F. Janssen, A. M. L. Pleshkov, M. Kingma, H. van Rompaey, V. Herssens, N. Hallemans, A. Vereeck, L. McCrum, C. Meijer, K. Guinand, N. Perez-Fornos, A. van de Berg, R. J Neurol Orginial Communication INTRODUCTION: Bilateral vestibulopathy (BVP) can affect visual acuity in dynamic conditions, like walking. This can be assessed by testing Dynamic Visual Acuity (DVA) on a treadmill at different walking speeds. Apart from BVP, age itself might influence DVA and the ability to complete the test. The objective of this study was to investigate whether DVA tested while walking, and the drop-out rate (the inability to complete all walking speeds of the test) are significantly influenced by age in BVP-patients and healthy subjects. METHODS: Forty-four BVP-patients (20 male, mean age 59 years) and 63 healthy subjects (27 male, mean age 46 years) performed the DVA test on a treadmill at 0 (static condition), 2, 4 and 6 km/h (dynamic conditions). The dynamic visual acuity loss was calculated as the difference between visual acuity in the static condition and visual acuity in each walking condition. The dependency of the drop-out rate and dynamic visual acuity loss on BVP and age was investigated at all walking speeds, as well as the dependency of dynamic visual acuity loss on speed. RESULTS: Age and BVP significantly increased the drop-out rate (p ≤ 0.038). A significantly higher dynamic visual acuity loss was found at all speeds in BVP-patients compared to healthy subjects (p < 0.001). Age showed no effect on dynamic visual acuity loss in both groups. In BVP-patients, increasing walking speeds resulted in higher dynamic visual acuity loss (p ≤ 0.036). CONCLUSION: DVA tested while walking on a treadmill, is one of the few “close to reality” functional outcome measures of vestibular function in the vertical plane. It is able to demonstrate significant loss of DVA in bilateral vestibulopathy patients. However, since bilateral vestibulopathy and age significantly increase the drop-out rate at faster walking speeds, it is recommended to use age-matched controls. Furthermore, it could be considered to use an individual “preferred” walking speed and to limit maximum walking speed in older subjects when testing DVA on a treadmill. Springer Berlin Heidelberg 2020-10-28 2020 /pmc/articles/PMC7718189/ /pubmed/33113022 http://dx.doi.org/10.1007/s00415-020-10249-z Text en © The Author(s) 2020 Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Orginial Communication Starkov, D. Snelders, M. Lucieer, F. Janssen, A. M. L. Pleshkov, M. Kingma, H. van Rompaey, V. Herssens, N. Hallemans, A. Vereeck, L. McCrum, C. Meijer, K. Guinand, N. Perez-Fornos, A. van de Berg, R. Bilateral vestibulopathy and age: experimental considerations for testing dynamic visual acuity on a treadmill |
title | Bilateral vestibulopathy and age: experimental considerations for testing dynamic visual acuity on a treadmill |
title_full | Bilateral vestibulopathy and age: experimental considerations for testing dynamic visual acuity on a treadmill |
title_fullStr | Bilateral vestibulopathy and age: experimental considerations for testing dynamic visual acuity on a treadmill |
title_full_unstemmed | Bilateral vestibulopathy and age: experimental considerations for testing dynamic visual acuity on a treadmill |
title_short | Bilateral vestibulopathy and age: experimental considerations for testing dynamic visual acuity on a treadmill |
title_sort | bilateral vestibulopathy and age: experimental considerations for testing dynamic visual acuity on a treadmill |
topic | Orginial Communication |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7718189/ https://www.ncbi.nlm.nih.gov/pubmed/33113022 http://dx.doi.org/10.1007/s00415-020-10249-z |
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