Speed- and mode-dependent modulation of the center of mass trajectory in human gaits as revealed by Lissajous curves
Speed- and mode-dependent modulation of the center of mass trajectory in human gaits as revealed by Lissajous curves
复制标题
李萨如曲线揭示的人类步态质心轨迹的速度和模式相关调制
DOI：
10.1016/j.jbiomech.2020.109947
复制
发表时间：
2020
影响因子：
2.4
通讯作者：
Nakazawa Kimitaka
中科院分区：
文献类型：
--
作者：
Takiyama Ken;Yokoyama Hikaru;Kaneko Naotsugu;Nakazawa Kimitaka
中枢神经系统(CNS)在多种速度和模式下实现稳定的步态，同时控制不同的不稳定性。步态的一个基本特征是身体重心的运动。COM运动在内侧方向侵入支撑基底部的风险比在前后方向大。因此，前平面上的COM轨迹如何随着速度或模式的变化而变化，可以为稳定步态的神经控制提供见解。在这里，我们利用李萨如曲线揭示了轨道的速度和模式相关的调制。目前的研究表明，速度相关的调制在行走中是明显的。在步行和跑步之间，存在显著的模式依赖的调制。相比之下，在跑步过程中没有明显的速度相关调制。通过李萨如曲线拟合量化的标准倾向偏差可能是步态损伤和治疗后恢复的迹象。
The central nervous system (CNS) achieves a stable gait at several speeds and modes while controlling diverse instability. An essential feature of a gait is the motion of the center of body mass (CoM). CoM motion is at larger risk for trespassing the base of support in the mediolateral direction than in the anteroposterior direction. How the CoM trajectory in the frontal plane changes depending on the speed or mode can thus provide insights about the neural control of stable gaits. Here, we reveal the speed- and mode-dependent modulations of the trajectory by utilizing a Lissajous curve. The current study clarifies that speed-dependent modulations are evident in walking. Between walking and running, there were significant mode-dependent modulations. In contrast, there were no significant speed-dependent modulations during running. Deviations from standard tendencies quantified via Lissajous curve fitting could be a sign of gait impairments and recovery after treatments.