Brain Atrophy and Trunk Stability During Dual-Task Walking Among Older Adults (original) (raw)
Journal Article
1Section for Health Promotion, Department of Health and Medical Care, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, Obu, Japan
2Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Japan
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1Section for Health Promotion, Department of Health and Medical Care, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, Obu, Japan
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1Section for Health Promotion, Department of Health and Medical Care, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, Obu, Japan
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1Section for Health Promotion, Department of Health and Medical Care, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, Obu, Japan
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3Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, Obu, Japan
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3Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, Obu, Japan
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2Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Japan
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4Research Institute, National Center for Geriatrics and Gerontology, Obu, Japan
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Accepted:
25 October 2011
Published:
15 December 2012
Cite
Takehiko Doi, Hyuma Makizako, Hiroyuki Shimada, Daisuke Yoshida, Kengo Ito, Takashi Kato, Hiroshi Ando, Takao Suzuki, Brain Atrophy and Trunk Stability During Dual-Task Walking Among Older Adults, The Journals of Gerontology: Series A, Volume 67, Issue 7, July 2012, Pages 790–795, https://doi.org/10.1093/gerona/glr214
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Abstract
Background.
Dual-task walking is believed to be more cognitively demanding than normal walking and alters trunk movement among older adults. However, the possible association between brain atrophy and spatiotemporal gait parameters, particularly during dual-task walking, is poorly understood. In this study, we examined the relationship between dual-task walking and brain atrophy.
Methods.
One hundred ten elderly adults (aged 65–94 years, women n = 55) underwent magnetic resonance imaging scanning and gait experiments under normal and dual-task walking conditions. Linear accelerations of the trunk were measured in vertical, anteroposterior, and mediolateral directions using a triaxial accelerometer attached to the lower trunk. Gait speed, stride length, and cadence were recorded. The harmonic ratio, a measure of trunk stability, was computed separately in each direction to evaluate the smoothness of trunk movement during walking. Brain atrophy was quantitatively assessed using magnetic resonance image data.
Results.
Gait speed, stride length, cadence, and harmonic ratio in all directions were lower in dual-task walking than in normal walking (p < .05). The dual-task–related changes in harmonic ratio were independently correlated with brain atrophy adjusted for subject characteristics only in the vertical direction (p < .05).
Conclusions.
Our findings support the hypothesis that dual-task walking is more cognitively demanding than normal walking. Decreased trunk stability during dual-task walking is associated with brain atrophy. Additional studies are necessary to elucidate the effects of regional brain atrophy on the control of walking.
© The Author 2011. Published by Oxford University Press on behalf of The Gerontological Society of America. All rights reserved. For permissions, please e-mail: [email protected].
Topic:
- magnetic resonance imaging
- gait
- atrophy
- diencephalon
- older adult
- cerebral atrophy
- cadence trial
- walking speed
- length of stride during ambulation
- characteristics of gait
- gait normal
- trunk structure
- accelerometers
- harmonics
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