Age-Related Effects on Postural Control under Multi-Task Conditions
Age-Related Effects on Postural Control under Multi-Task Conditions
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DOI：
10.1159/000322196
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发表时间：
2011-01-01
期刊：
影响因子：
3.5
通讯作者：
Kressig, Reto W.
中科院分区：
文献类型：
--
作者：
Granacher, Urs;Bridenbaugh, Stephanie A.;Kressig, Reto W.
背景资料：先前已报告过同时执行认知（CI）和/或运动干扰（MI）任务导致的姿势摇摆和步态模式变化，并与老年人跌倒风险增加相关。目的：本研究的目的是调查CI和/或MI任务对年轻和老年受试者静态和动态姿势控制的影响，并找出静态和动态姿势控制措施之间是否存在关联，同时执行CI和/或MI任务。研究方法：共有36名健康年轻人（n = 18;年龄：22.3 +/- 3.0岁; BMI：21.0 +/- 1.6 kg/m2）和老年人（n = 18;年龄：73.5 +/- 5.5岁; BMI：24.2 +/- 2.9 kg/m2）参与了本研究。在双足站立时测量静态姿势控制，在装有仪器的走道上行走时获得动态姿势控制。结果如下：无论任务条件，即单任务或多个任务，老年参与者表现出更大的压力中心位移和更大的步幅比年轻的参与者的步幅变化。静态和动态姿势控制的措施之间的关联，发现只有在老年人的单任务条件下。结论：姿势控制系统中的神经元相关缺陷似乎是观察结果的主要原因。静态和动态测量之间的弱相关性表明，跌倒风险评估应包括多任务条件下的动态测量，并且直立站立和行走等技能是相互独立的，可能需要补充训练。版权所有（C）2010 S. Karger AG，巴塞尔
Background: Changes in postural sway and gait patterns due to simultaneously performed cognitive (CI) and/or motor interference (MI) tasks have previously been reported and are associated with an increased risk of falling in older adults. Objective: The objectives of this study were to investigate the effects of a CI and/or MI task on static and dynamic postural control in young and elderly subjects, and to find out whether there is an association between measures of static and dynamic postural control while concurrently performing the CI and/or MI task. Methods: A total of 36 healthy young (n = 18; age: 22.3 +/- 3.0 years; BMI: 21.0 +/- 1.6 kg/m(2)) and elderly adults (n = 18; age: 73.5 +/- 5.5 years; BMI: 24.2 +/- 2.9 kg/m(2)) participated in this study. Static postural control was measured during bipedal stance, and dynamic postural control was obtained while walking on an instrumented walkway. Results: Irrespective of the task condition, i.e. single-task or multiple tasks, elderly participants showed larger center-of-pressure displacements and greater stride-to-stride variability than younger participants. Associations between measures of static and dynamic postural control were found only under the single-task condition in the elderly. Conclusion: Age-related deficits in the postural control system seem to be primarily responsible for the observed results. The weak correlations detected between static and dynamic measures could indicate that fall-risk assessment should incorporate dynamic measures under multi-task conditions, and that skills like erect standing and walking are independent of each other and may have to be trained complementarily. Copyright (C) 2010 S. Karger AG, Basel