The effects of object height and visual information on the control of obstacle crossing during locomotion in healthy older adults |
| |
| Affiliation: | 1. Graduate School of Human Development and Environment, Kobe University, 3-11 Tsurukabuto, Nada-ku, Kobe-shi, Hyogo, 657-8501, Japan;2. Department of Rehabilitation, Midorigaoka Hospital, 3-13-1, Makamicho, Takatsuki-shi, Osaka, 569-1121, Japan;1. Institute of Sport, Exercise and Active Living, Victoria University, Melbourne, Victoria 8001, Australia;2. College of Sport & Exercise Science, Victoria University, Melbourne, Victoria 8001, Australia;3. College of Engineering & Science, Victoria University, Melbourne, Victoria 8001, Australia;1. Department of Sport Science, Otto von Guericke University Magdeburg, Germany;2. Department of Sport Science, Friedrich Schiller University Jena, Germany;1. Department of Physical Therapy, Tsukuba International University, 6-8-33 Manabe, Tsuchiura, Ibaraki, Japan;2. Department of Physical Therapy, Ibaraki Prefectural University of Health Sciences, 4669-2 Ami, Ami, Ibaraki, Japan;3. Department of Physical Therapy, Mejiro University, 320 Ukiya, Iwatsuki, Saitama, Japan;1. UNESP – São Paulo State University at Rio Claro – LEPLO, São Paulo, Brazil;2. MOVE Research Institute Amsterdam, Faculty of Human Movement Sciences, VU University Amsterdam, Amsterdam, The Netherlands;3. King Abdulaziz University, Jeddah, Saudi Arabia;1. Department of Health and Kinesiology, Purdue University, West Lafayette, IN, USA;2. Center on Aging and the Life Course, Purdue University, West Lafayette, IN, USA;1. Human Health and Nutritional Sciences, University of Guelph, Canada;2. Schlegel-UW Research Institute for Aging, Kitchener, ON, Canada |
| |
| Abstract: | In order to safely avoid obstacles, humans must rely on visual information regarding the position and shape of the object obtained in advance. The present study aimed to reveal the duration of obstacle visibility necessary for appropriate visuomotor control during obstacle avoidance in healthy older adults. Participants included 13 healthy young women (mean age: 21.5 ± 1.4 years) and 15 healthy older women (mean age: 68.5 ± 3.5 years) who were instructed to cross over an obstacle along a pressure-sensitive pathway at a self-selected pace while wearing liquid crystal shutter goggles. Participants were evaluated during three visual occlusion conditions: (i) full visibility, (ii) occlusion at T-1 step (T: time of obstacle crossing), and (iii) occlusion at T-2 steps. Toe clearances of both the lead and trail limb (LTC and TTC) were calculated. LTC in the occlusion at T-2 steps condition was significantly greater than that in other conditions. Furthermore, a significant correlation was observed between LTC and TTC in both groups, regardless of the condition or obstacle height. In the older adult group alone, step width in the occlusion at T-2 steps condition increased relative to that in full visibility conditions. The results of the present study suggest that there is no difference in the characteristics of visuomotor control for appropriate obstacle crossing based on age. However, older adults may exhibit increased dependence on visual information for postural stability; they may also need an increased step width when lacking information regarding their positional relationship to obstacles. |
| |
| Keywords: | Vision Obstacle crossing Gait Older adults |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
