A nonlinear approach to tracking slow-time-scale changes in movement kinematics
A nonlinear approach to tracking slow-time-scale changes in movement kinematics
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DOI：
10.1016/j.jbiomech.2006.06.019
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发表时间：
2007-01-01
影响因子：
2.4
通讯作者：
Chelidze, David
中科院分区：
文献类型：
--
作者：
Dingwell, Jonathan B.;Napolitano, Domenic F.;Chelidze, David
像重复性劳损（RSIs）这样的退化过程会导致正常的运动模式随着时间的推移而缓慢改变。准确跟踪这些疾病/损伤过程如何随时间演变并预测其未来进展可以进行早期干预并防止进一步恶化。然而，这些过程往往不能直接测量，这些过程的第一原理模型以及它们如何影响运动控制非常复杂，难以通过分析得出。这项研究的目的是确定在不需要第一原理模型或直接测量损伤本身的情况下开发的跟踪机械系统中损伤累积的算法是否也可以在生物力学背景下跟踪类似的“隐藏”过程。五名健康成年人以他们喜欢的速度在电动跑步机上行走，同时跑步机倾斜角度从0度（水平）缓慢增加到大约± 8度。计算左髋、膝和踝关节的运动学。独立记录跑步机倾斜角度，并定义要跟踪的“损伤”。标量跟踪度量从下肢步行运动学计算。这些指标与跑步机倾斜度表现出很强的立方关系（88.9%）。
Degenerative processes like repetitive strain injuries (RSIs) cause normal movement patterns to change slowly over time. Accurately tracking how these disease/injury processes evolve over time and predicting their future progression could allow early intervention and prevent further deterioration. However, these processes often cannot be measured directly and first-principles models of these processes and how they affect movement control are highly complex and difficult to derive analytically. This study was conducted to determine if algorithms developed to track damage accumulation in mechanical systems without requiring first-principles models or direct measurements of the damage itself could also track a similar "hidden" process in a biomechanical context. Five healthy adults walked on a motorized treadmill at their preferred speed, while the treadmill inclination angle was slowly increased from 0 degrees (level) to approximately + 8 degrees. Sagittal plane kinematics for the left hip, knee, and ankle joints were computed. The treadmill inclination angle was independently recorded and defined the "damage" to be tracked. Scalar tracking metrics were computed from the lower extremity walking kinematics. These metrics exhibited strong cubic relationships with treadmill inclination (88.9%