Occlusion of the lower visual field when wearing a facial mask does not compromise gait control when stepping into a hole in older adults |
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| Affiliation: | 1. Biomechanics and Motor Control Lab, School of Physical Education and Sport of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil;2. Graduate Program in Rehabilitation and Functional Performance, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil;1. Département des sciences de l''activité physique, Université du Québec à Trois-Rivières, 3351, boulevard des Forges, Trois-Rivières, QC G8Z 4M3, Canada;2. École de kinésiologie et des sciences de l''activité physique de la Faculté de médecine, Université de Montréal, 2100 Edouard Montpetit Blvd. #6219, Montreal, QC H3T 1J4, Canada;3. Centre de recherche du CHU Sainte-Justine, 5858 Côte-des-Neiges Rd, Montreal, QC H3S 1Z1, Canada;4. Department of Family Medicine, McGill University, 5858 Côte-des-Neiges Rd, Montreal, QC H3S 1Z1, Canada;5. Human Kinetics Department, St Francis Xavier University, 4130 University Ave, Antigonish, NS B2G 2W5, Canada;6. Département de kinésiologie, Université Laval, 2300, rue de la Terrasse, Quebec, QC G1V 0A6, Canada;7. Département de Pédiatrique, Faculté de médecine, Université de Montréal, 3175, chemin Côte Sainte-Catherine, Montréal, QC H3T 1C5, Canada;1. Institute of Physical Therapy, Prevention and Rehabilitation, University Medical Center of the Johannes Gutenberg University Mainz, Langenbeckstrasse 1, D-55131 Mainz, Germany;2. Institute of Medical Biostatistics, Epidemiology and Informatics, University Medical Center of the Johannes Gutenberg University Mainz, Obere Zahlbacher Straße 69, D-55131 Mainz, Germany;3. Institute of Complex Health Sciences, Hochschule Fresenius, University of Applied Sciences, Limburgerstr. 2, D-65510 Idstein, Germany;4. Department of Orthopedics and Trauma Surgery, University Medical Center of the Johannes Gutenberg University Mainz, Langenbeckstrasse 1, D-55131 Mainz, Germany;1. Department of Physical Therapy, California State University Northridge, Northridge, CA, USA;2. Department of Biological Sciences, University of Southern California, Los Angeles, CA, USA;3. Department of Psychology, University of Southern California, Los Angeles, CA, USA;4. Department of Biomedical Engineering, University of Southern California, Los Angeles, CA, USA;1. Institute of Psychology, Department of Psychology and Sports Medicine, UMIT TIROL - Private University for Health Sciences and Health Technology, Hall in Tyrol, Austria;2. Department of Psychology, Faculty of Psychology and Sports Sciences, University of Innsbruck, Austria;1. Department of Sport and Sport Science, University of Freiburg, Freiburg, Germany;2. Institute for Advanced Biomechanics and Motion Studies, Offenburg University of Applied Sciences, Offenburg, Germany;3. Romanisches Seminar, University of Freiburg, Freiburg, Germany |
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| Abstract: | Visual exproprioception obtained from the lower visual field (LVF) is used to control locomotion on uneven terrain. Wearing a facial mask obstructs the LVF and can compromise gait control. Therefore, this study aimed to investigate the effect of occluding the LVF when wearing a facial mask on gait control while walking and stepping into a hole in older adults. Fifteen older adults walked along a wooden walkway under two different surface conditions (without and with a hole [60 cm wide and long, with a depth of 9.5 cm] and three visual conditions (control, mask, and basketball goggles with an occluded LVF). We found that occlusion of the LVF with masks or goggles did not affect the adaptations necessary to step into a hole. Neither behavioral (gait speed, margin of stability, foot landing position) nor neuromuscular (EMG activation and co-activation) parameters were affected by either visual manipulation. Older adults used a downward head pitch strategy to compensate for visual obstruction and plan the anticipatory adjustments to step into the hole. The absence of lower limb visual exproprioception due to wearing a mask did not affect locomotion control when stepping into a hole in older adults. Older adults compensated for the obstruction of the LVF through head downward tilt, which allowed them to obtain visual information about the hole two steps ahead to make anticipatory locomotor adjustments. |
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