Body weight support impacts lateral stability during treadmill walking.
Body weight support impacts lateral stability during treadmill walking.
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DOI：
10.1016/j.jbiomech.2016.05.026
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发表时间：
2016-09-06
影响因子：
2.4
通讯作者：
Gordon, Keith E.
中科院分区：
文献类型：
--
作者：
Dragunas, Andrew C.;Gordon, Keith E.
关键词：
体重支持系统是步态康复中常用的工具。BWS系统可以通过以下方式改变个体主动稳定的要求：1)提供侧向恢复力，减少神经系统主动稳定的要求；2)减少额面上的稳定重力矩，这可能增加主动稳定的要求。目前这项研究的目标是量化BWS和侧向稳定性之间的相互作用。我们假设，当身体健全的人用BWS行走时：1)BWS提供的横向恢复力会降低动态相似步态时在额面稳定的要求，2)增加BWS会减少额面稳定的重力矩，而增加速度约束时的稳定要求。我们的发现部分支持了这些假设，但也表明了BWS和侧向稳定性之间存在复杂的相互作用。使用BWS，受试者在动态相似和速度匹配的情况下，步幅变异性显著降低，步幅显著增加(p<；0.05)。步幅可变性的降低可能归因于侧向恢复力的组合，降低了稳定所需的机械条件，以及增强的位置感，这可能会改善运动控制。在高体位行走时，步幅的增加可能是由于站立肢体的重力力矩减少，这可能会对多平面稳定性的控制构成挑战。
Body weight support (BWS) systems are a common tool used in gait rehabilitation. BWS systems may alter the requirements for an individual to actively stabilize by 1) providing lateral restoring forces that reduce the requirements for the nervous system to actively stabilize and 2) decreasing the stabilizing gravitational moment in the frontal plane, which could increase the requirements to actively stabilize. The goal of the current study was to quantify the interaction between BWS and lateral stability. We hypothesized that when able-bodied people walk with BWS: 1) the lateral restoring forces provided by BWS would reduce the requirements to stabilize in the frontal plane when comparing dynamically similar gaits, and 2) increasing BWS would decrease the stabilizing gravitational moment in the frontal plane and increase the requirements to stabilize when speed is constrained. Our findings partly support these hypotheses, but indicate a complex interaction between BWS and lateral stability. With BWS, subjects significantly decreased step width variability and significantly increased step width (p < 0.05) for both the dynamically similar and speed-matched conditions. The decrease in step width variability may be attributable to a combination of lateral restoring forces decreasing the mechanical requirements to stabilize and an enhanced sense of position that could have improved locomotor control. Increases in step width when walking with high levels of BWS could have been due to decreases in the gravitational moment about the stance limb, which may challenge the control of stability in multiple planes.
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影响因子：
9.2
作者：
Kuo, AD
通讯作者：
Kuo, AD
影响因子：
5.1
作者：
Kyvelidou A;Kurz MJ;Ehlers JL;Stergiou N
通讯作者：
Stergiou N
影响因子：
3.2
作者：
FINCH, L;BARBEAU, H;ARSENAULT, B
通讯作者：
ARSENAULT, B
影响因子：
2.4
作者：
Ijmker, Trienke;Houdijk, Han;van der Woude, Lucas H. V.
通讯作者：
van der Woude, Lucas H. V.
影响因子：
2.8
作者：
Leurs, Francoise;Ivanenko, Yuri P.;Cheron, Guy A.
通讯作者：
Cheron, Guy A.