视觉旋转对方向方向和质量控制中心在稳定状态行走过程中的影响
Joost Biere1,2, Brenda E Groen1,3, Noël L W Keijsers1,2,3
1Department of Research, Sint Maartenskliniek, Nijmegen, The Netherlands.
Journal of neurophysiology
|May 15, 2024
概括
人类将步行轨迹适应视野旋转,这种现象被称为视觉合. 参与者调整了他们对新方向的中侧边际稳定率,而没有改变质量中心游览或脚部放置策略.
科学领域:
- 人类的运动和平衡控制.
- 感知和行动的神经科学.
- 步态的生物力学
背景情况:
- 视觉信息对于导航和在步行时保持平衡至关重要.
- 视野旋转可能会扰乱方向感知,导致步态偏差 (视觉合).
- 在视觉合期间,相对于支底部 (BoS),质量中心 (CoM) 控制中的适应仍然不清楚.
研究的目的:
- 为了研究中侧 (ML) 平衡控制机制在视觉合在稳定状态的步行.
- 描述如何根据视觉旋转调整稳定性边际 (MoS) 和脚位策略.
- 了解视觉合强度和步态调整之间的关系.
主要方法:
- 十六名健康参与者在带有仪器的跑步机上行走,诱导不同幅度和周期的侧侧视野旋转 (0.1 Hz).
- 视觉合被量化使用CoM轨迹和视觉旋转之间的交叉相关性.
- 中侧平衡控制通过ML稳定边际 (MoS) 和脚位控制分析来评估.
主要成果:
- 在所有旋转条件下,在组和个人层面都观察到强烈的视觉合.
- 更高的视觉旋转幅度导致了更大的步行轨迹偏差.
- MoSML转向偏差的方向,而脚位控制在很大程度上保持不变.
- 观察到骨盆和脚的重定向向视觉旋转方向.
结论:
- 视觉合是通过身体重定向和将外推的CoMML转移到靠近横向BoS边界来促进的.
- 这些调整发生在感知方向的方向上,同时保持CoM外流和脚位控制.
- 这项研究揭示了适应性平衡策略,用于在步行过程中导航改变的视觉环境.
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