Mechanisms to increase propulsive force for individuals poststroke.
Mechanisms to increase propulsive force for individuals poststroke.
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DOI：
10.1186/s12984-015-0030-8
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发表时间：
2015-04-18
影响因子：
5.1
通讯作者：
Binder-Macleod SA
中科院分区：
文献类型：
--
作者：
Hsiao H;Knarr BA;Higginson JS;Binder-Macleod SA
推进力的产生对步行速度至关重要。试验肢体角度和踝关节力矩是步态过程中推进力增加的主要因素。对于身体健全的人来说，在速度调节过程中，后肢角度对推进力增加的贡献是脚踝力矩的两倍。这项研究的目的是量化踝关节力矩和后肢角度对中风后个体推进力增加的相对贡献。对先前为健全个体开发的基于生物力学的模型进行了评估，并对中风后个体进行了增强。对24例慢性卒中后偏瘫患者(N = 24例)在跑步机上以自己选择的快步行速度步行进行步态分析。在速度调节过程中，后肢角度和踝关节力矩均增大。在偏瘫肢体，后肢角度与踝关节力矩对推进力增加的贡献率分别为74%和17%。在非偏瘫肢体中，后肢角度与踝关节力矩对推进力增加的贡献分别为67%和22%。卒中后个体主要通过改变偏瘫和非偏瘫肢体的后肢角度来增加推进力。这种策略可能是中风后步行模式效率低下的原因之一。这些特征是否可以通过干预来改变，还需要进一步的研究。
Propulsive force generation is critical to walking speed. Trialing limb angle and ankle moment are major contributors to increases in propulsive force during gait. For able-bodied individuals, trailing limb angle contributes twice as much as ankle moment to increases in propulsive force during speed modulation. The aim of this study was to quantify the relative contribution of ankle moment and trailing limb angle to increases in propulsive force for individuals poststroke. A biomechanical-based model previously developed for able-bodied individuals was evaluated and enhanced for individuals poststroke. Gait analysis was performed as subjects (N = 24) with chronic poststroke hemiparesis walked at their self-selected and fast walking speeds on a treadmill. Both trailing limb angle and ankle moment increased during speed modulation. In the paretic limb, the contribution from trailing limb angle versus ankle moment to increases in propulsive force is 74% and 17%. In the non-paretic limb, the contribution from trailing limb angle versus ankle moment to increases in propulsive force is 67% and 22%. Individuals poststroke increase propulsive force mainly by changing trailing limb angle in both the paretic and non-paretic limbs. This strategy may contribute to the inefficiency in poststroke walking patterns. Future work is needed to examine whether these characteristics can be modified via intervention.
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影响因子：
4.2
作者：
Dobkin, Bruce H.;Plummer-D'Amato, Prudence;Lee, Jihey
通讯作者：
Lee, Jihey
影响因子：
8.3
作者：
Bowden, MG;Balasubramanian, CK;Kautz, SA
通讯作者：
Kautz, SA
影响因子：
1.8
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Bourbonnais, D
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3
作者：
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通讯作者：
Hoff, Jan
影响因子：
2.4
作者：
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通讯作者：
Donelan, J. Maxwell