A generalized framework for determination of functional musculoskeletal joint coordinate systems.
A generalized framework for determination of functional musculoskeletal joint coordinate systems.
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DOI：
10.1016/j.jbiomech.2021.110664
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发表时间：
2021-10-11
影响因子：
2.4
通讯作者：
Colbrunn RW
中科院分区：
文献类型：
--
作者：
Nagle TF;Erdemir A;Colbrunn RW
从解剖标志建立解剖坐标系（CS）对标志选择敏感。在观察者之间可以获得非常不同的结果，这可以极大地影响所得到的关节运动学。本研究的目的是介绍一种客观的方法来计算功能CS的定义，观察三个圆柱关节运动链分解方法，并应用于胫股关节标本的骨骼。该方法是由加载曲线期间的低阻力关节运动驱动的，而不是来自解剖标志选择。根据5名观察员收集的12个膝关节的点，建立了两个解剖学CS定义。使用解剖CS对膝关节进行被动屈曲和内旋/外旋。这些曲线的运动学用于离轴运动的线性最小二乘最小化，以重新定义胫骨和股骨原点、股骨屈曲轴和胫骨内旋轴。与两种解剖CS相比，观察到两种功能CS之间的再现性显著改善7.4 mm（胫骨起点，p <0.001）、3.4 mm（股骨起点，p<0.001）和2.9 °（股骨FE轴，p<0.001）。功能CS导致离散被动屈曲曲线期间离轴运动显著减少。这种新的策略，建立功能CS提供了一个客观的方法，将减少在建立CS的观察员错误的影响。此外，功能CS允许更好地解释由于加载的运动响应，因为运动串扰的影响被最小化。
Establishing anatomical coordinate systems (CS) from anatomical landmarks is sensitive to landmark selection. Vastly different results can be obtained amongst observers which can greatly affect the resulting joint kinematics. The aim of this study is to introduce an objective method for calculating functional CS definitions for bones in joints that observe three-cylindrical-joint kinematic chain decomposition methods and to apply the method on tibiofemoral joint specimens. This method is driven by low resistance joint motion during loading profiles and not from anatomical landmark selection. Two anatomical CS definitions were established from points collected by five observers, for twelve knees. The knees underwent passive flexion and internal/external rotation using the anatomical CSs. The kinematics from these profiles were used in linear least squares minimization of off-axis motions to redefine the tibia and femur origins, the femur flexion axis and the tibia internal rotation axis. Significant improvements in reproducibility of 7.4 mm (tibia origin, p<0.001), 3.4 mm (femur origin, p<0.001), and 2.9 ° (femur FE-axis, p<0.001) between the two functional CSs compared to the two anatomical CSs were observed. Functional CSs led to significant decreases in off-axis motion during discrete passive flexion profiles. This new strategy for establishing functional CSs provides an objective approach that will reduce the effects of observer error in establishing CSs. Additionally, functional CSs allow for better interpretations of kinematic responses due to loading because effects of kinematic cross-talk is minimized.
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影响因子：
2.5
作者：
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发表时间：
1966-01-01
期刊：
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影响因子：
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通讯作者：
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DOI：
10.1115/1.3138397
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