断面时间相关的角分布支持适应性反应,摇摆板的不稳定性
Brian Schlattmann1, Ken Kiyono2, Damian G Kelty-Stephen3
1Department of Biomechanics, Center for Research in Human Movement Variability, Division of Biomechanics and Research Development, University of Nebraska at Omaha, Omaha, NE 68182, USA.
Journal of the Royal Society, Interface
|February 4, 2025
概括
人类姿势控制模型使用摇摆板和认知任务进行了测试. 不稳定性,而不是注意力,重塑了碎形相关性,挑战了传统模型并突出了二维支表面的动态.
科学领域:
- 人类运动控制器
- 生物物理学的生物物理.
- 认知神经科学是一种认知神经科学.
背景情况:
- 目前的姿势控制模型使用间歇式控制器和沿着解剖轴的形分流器.
- 在压力中心 (CoP) 观察到碎形时间相关性,通常沿前后 (AP) 轴较强.
- 现有的模型可能无法完全考虑2D支面的全角度范围内的控制策略.
研究的目的:
- 调查姿势不稳定性和注意力负载如何影响2D支面上的碎形变化.
- 为了确定任务需求是否影响碎形时间相关的角分布.
- 通过检查主要解剖学轴之外的控制来挑战传统的姿势控制理论.
主要方法:
- 48名健康的成年人站在摇摆板上 (ML扰动) 在执行注意力负荷的Trail Making Test (TMT) 时.
- 分析了2D支表面的COP位移中的碎形时间相关性.
- 在不同的条件下检查了角变化和碎形相关性强度的变化.
主要成果:
- 稳定的立场显示了经典的式拓,在AP轴沿线具有更强的碎形相关性.
- 来自TMT的注意力负荷并没有改变角度变化或碎形相关性强度.
- 摇摆板的不稳定性显著重塑和重定向碎形相关性,强调ML轴动力学和式角分布.
结论:
- 姿势不稳定,而不是注意力负荷,是调制二维支面上的分形时间相关性的关键因素.
- 这些发现挑战了在姿势控制理论中对解剖AP/ML轴的排他依赖.
- 多分体性和角动力学对于理解姿势稳定性参数至关重要.
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