在分带行走过程中,不对称性和反应平衡控制之间的关联
Tara Cornwell1, Ryan Novotny2, James M Finley3
1Department of Biomedical Engineering, Viterbi School of Engineering, University of Southern California, Los Angeles, CA, USA.
Journal of biomechanics
|July 7, 2024
概括
在分带跑步机上适应步行减少了步骤长度不对称 (SLA),可能改善前向平衡,但冒着横向不稳定的风险. 这项研究研究了SLA变化如何影响行走扰乱期间的反应平衡控制.
科学领域:
- 生物力学 生物力学
- 人类运动控制人体运动控制
- 神经科学是一个神经科学.
背景情况:
- 分裂带跑步机行走诱导了步骤长度不对称性 (SLA) 的适应性变化.
- 讨论了减少不稳定性在推动这些适应过程中的作用.
- 对于SLA变化的反应平衡控制的影响仍然不清楚.
研究的目的:
- 调查是否改变的步长不对称性 (SLA) 影响反应平衡控制.
- 为了确定SLA和整体角动量 (WBAM) 在扰动过程中的关系.
- 为了检查在分带行走过程中脚位的调整如何影响平衡.
主要方法:
- 十六名老年人走在一个分带跑步机上,速度比为2:1.
- 应用间歇性扰动来评估反应平衡.
- 混合效应模型分析了SLA,脚位和WBAM之间的关联.
主要成果:
- 增加的SLA与减少的前方WBAM有关,但在扰乱期间增加了横向WBAM.
- 缩短了脚部位置,增加了SLA,进一步减少了向前WBAM,但增加了横向WBAM.
- 这些发现突出了斜面和正面平面稳定性之间的权衡.
结论:
- 在分腰带行走期间的时空适应可能会增强斜腰平面的稳定性.
- 这些适应可能会损害前面平面的稳定性.
- 了解这些权衡对于步行康复和防摔策略至关重要.
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