Older adults exhibit altered motor coordination during an upper limb object transport task requiring a lateral change in support |
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| Affiliation: | 1. Human Health and Nutritional Sciences, University of Guelph, Canada;2. Schlegel-UW Research Institute for Aging, Kitchener, ON, Canada;1. Department of Life Sciences, Graduate School of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan;2. School of Rehabilitation, Université de Montréal, 7077 Avenue du Parc, Montréal, Quebec H3C 3J7, Canada;3. Pathokinesiology Laboratory, Centre for Interdisciplinary Research in Rehabilitation of the Institut de réadaptation Gingras-Lindsay-de-Montréal, 6300 Avenue du Darlington, Montréal, Quebec H3S 2J4, Canada;4. Institute of Biomaterials and Biomedical Engineering, University of Toronto, 164 College Street, Toronto, Ontario M5S 3G9, Canada;5. Rehabilitation Engineering Laboratory, Lyndhurst Centre, Toronto Rehabilitation Institute – University Health Network, 520 Sutherland Drive, Toronto, Ontario M4G 3V9, Canada;1. Human Movement Biomechanics Research Group, Department of Kinesiology, KU Leuven, Belgium;2. Musculoskeletal Rehabilitation Research Group, Department of Rehabilitation Sciences, KU Leuven, Belgium;1. Department of Rehabilitation Sciences, KU Leuven - University of Leuven, Leuven, Tervuursevest 101, 3001 Leuven Heverlee Belgium;2. Rehazentrum Valens - Kliniken Valens, Valens, Switzerland, Taminaplatz 1, 7317 Valens, Switzerland;3. UZ Leuven - University Hospitals Leuven, Department of Physical Medicine and Rehabilitation, UZ Leuven campus Pellenberg, Weligerveld 1, 3212 Pellenberg, Belgium;4. UZ Leuven - University Hospitals Leuven, Department of Geriatrics, UZ Leuven campus Pellenberg, Weligerveld 1, 3212 Pellenberg, Belgium |
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| Abstract: | Investigating an ecologically relevant upper limb task, such as manually transporting an object with a concurrent lateral change in support (sidestepping alongside a kitchen counter), may provide greater insight into potential deficits in postural stability, variability and motor coordination in older adults. Nine healthy young and eleven older, community dwelling adults executed an upper limb object transport task requiring a lateral change in support in two directions at two self-selected speeds, self-paced and fast-paced. Dynamic postural stability and movement variability was quantified via whole-body center of mass motion. The onset of lead lower limb movement in relation to object movement onset was quantified as a measure of motor coordination. Older adults demonstrated similar levels of stability and variability as their younger counterparts, but at slower peak movement velocity and increased task duration. Furthermore, older adults demonstrated asymmetrical motor coordination between left and right task directions, while younger adults remained consistent regardless of task direction. Thus, older adults significantly modulated movement speed and motor coordination to maintain similar levels of stability and variability compared to their younger counterparts. |
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| Keywords: | Falls Balance Older adults Motor coordination Stability |
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