The effects of fall history on kinematic synergy during walking.
The effects of fall history on kinematic synergy during walking.
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DOI：
10.1016/j.jbiomech.2018.10.032
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发表时间：
2019-01
影响因子：
2.4
通讯作者：
M. Yamagata;H. Tateuchi;I. Shimizu;N. Ichihashi
中科院分区：
文献类型：
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作者：
M. Yamagata;H. Tateuchi;I. Shimizu;N. Ichihashi
为了防止跌倒，行走时控制足部摆动至关重要。最近，一些研究表明，通过运动学协同作用实现下肢的协调运动对于稳定行走非常重要。然而，尚未进行研究来揭示跌倒与运动学协同作用之间的关系，并且尚不清楚跌倒历史是否会改变运动学协同作用。因此，本研究的目的是使用非受控流形 (UCM) 分析来测试跌倒历史对运动学协同作用的影响。老年人被分为两组：没有跌倒史的老年人（非跌倒者，n = 14）和测量前 12 个月内至少有一次跌倒史的老年人（跌倒者，n = 10）。受试者以自己舒适的速度在路径上行走并收集运动学数据。进行 UCM 分析是为了评估额状面、内侧和垂直方向的节段配置的变化如何影响摆动脚的额状轨迹。在所有阶段，跌倒者的节段配置变化都比非跌倒者更大。在内外侧方向上，在摆动早期和后期，跌倒者的运动学协同作用明显大于非跌倒者。另一方面，与非跌倒者相比，跌倒者在垂直方向上持续具有更大的运动学协同作用。结果显示，跌倒历史增加了运动学协同作用，尽管跌倒者需要更大的节段配置可变性作为补偿策略，以确保运动学协同作用。
To prevent falls, control of the swing foot during walking is crucial. Recently, some studies demonstrated that the coordinated movement of lower limbs by kinematic synergy is important for stable walking. However, no study has been carried out to reveal the relation between falls and kinematic synergy, and it is unclear whether fall history alters the kinematic synergy. Thus, the purpose of this study was to test the effects of fall history on kinematic synergy using uncontrolled manifold (UCM) analysis. Older adults were divided into two groups: older adults without fall history (non-fallers, n = 14) and older adults with fall history of at least one fall in the 12 months prior to the measurements (fallers, n = 10). Subjects walked at their own comfortable speed on a pathway and kinematic data were collected. UCM analysis was performed to assess how variability of segmental configurations in the frontal plane, the mediolateral and vertical directions, affects the frontal trajectory of the swing foot. Fallers had a greater variability of segmental configurations than non-fallers in all phases. In the mediolateral direction, the kinematic synergy in fallers was significantly greater than that in non-fallers during the early and late swing phases. On the other hands, fallers continuously had greater kinematic synergy compared to non-fallers in the vertical direction. The results revealed that fall history increased the kinematic synergy, although fallers needed a greater variability of segmental configurations as a compensatory strategy to ensure kinematic synergy.