年轻成年人经历来自不同方向的突然外部干扰的步骤策略
Thomas Chatagnon1, Anne-Hélène Olivier1, Ludovic Hoyet1
1Univ Rennes, Inria, CNRS, IRISA, M2S, France.
Journal of biomechanics
|July 14, 2023
概括
这项研究研究了在平衡恢复期间的逐步策略. 扰动方向显著影响了步骤,但意识水平没有,揭示了对人类姿势控制的关键见解.
科学领域:
- 生物力学 生物力学
- 人类运动科学 人类运动科学
- 神经科学是一个神经科学.
背景情况:
- 姿势稳定对于防止跌倒至关重要.
- 步骤化策略是重点平衡恢复机制.
- 了解扰动方向和意识如何影响步行至关重要.
研究的目的:
- 研究应对来自不同方向的外部干扰的逐步策略.
- 分析扰动角度和意识对步行行为的影响.
- 为了描述在角平面之外所采取的步骤.
主要方法:
- 一个新的实验范式,21名年轻成年人接受了1260个随机扰动.
- 在5个不同的角度进行了干扰,意识水平各不相同 (感官障碍装置).
- 步骤策略的分析,包括负载侧面步骤 (LSS),无负载中间步骤 (UMS) 和无负载交叉步骤 (UCS).
主要成果:
- 使用稳定边际 (MoS) 或到边界的时间 (Ttb) 的物流模型准确预测了角平面步骤 (>79%).
- 扰动角度显著影响了平衡恢复行为.
- 没有观察到意识水平对步骤策略的显著影响.
- 距离到脚边界 (DtFb) 已被提议用于表征非平面步行.
结论:
- 步进策略取决于方向,扰动角度是一个关键因素.
- 人类的意识并没有显著改变对干扰的逐步反应.
- DtFb是分析复杂,非松动步进策略的有用指标.
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