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首页> 外文期刊>Journal of Biomechanics >EFFECT OF SKIN MOVEMENT ON THE ANALYSIS OF SKELETAL KNEE JOINT MOTION DURING RUNNING
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EFFECT OF SKIN MOVEMENT ON THE ANALYSIS OF SKELETAL KNEE JOINT MOTION DURING RUNNING

机译：皮肤运动对跑步过程中骨骼关节运动的影响

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It is not known how well skin markers represent the skeletal knee joint motion during running. Hence, the purpose of this investigation was to compare the skin marker derived tibiofemoral motion with the skeletal tibiofemoral motion during running. In addition to skin markers attached to the shank and thigh, triads of reflective markers were attached to bone pins inserted into the tibia and femur. Three-dimensional kinematics of the stance phase of five running trials were recorded for three subjects using high-speed cine cameras (200 Hz). The knee motion was expressed in terms of Cardan angles calculated from both the external and skeletal markers. Good agreement was present between the skin and bone marker based knee flexion/extension. For abduction/adduction and internal/external knee rotation, the difference between skeletal and external motion was large compared to the amplitude of these motions. Average errors relative to the range of motion during running stance were 21% for flexion/extension, 63% for internal/external rotation, and 70% for abduction/adduction. The errors were highly subject dependent preventing the realization of a successful correction algorithm. It was concluded that knee rotations other than flexion/extension may be affected with substantial errors when using skin markers. (C) 1997 Elsevier Science Ltd. [References: 18]
机译：尚不清楚皮肤标记在跑步过程中如何很好地代表骨骼膝关节的运动。因此，该研究的目的是将跑步过程中皮肤标记衍生的胫股运动与骨骼胫股运动进行比较。除了附着在小腿和大腿上的皮肤标记外，三色反射标记也附着在插入胫骨和股骨的骨钉上。使用高速电影摄影机（200 Hz）记录了三个受试者的五个跑步试验的站立阶段的三维运动学。膝盖运动是根据从外部和骨骼标志物计算出的万向角来表示的。在基于皮肤和骨骼标志物的膝盖屈伸中存在良好的一致性。对于外展/内收和内部/外部膝盖旋转，与这些运动的幅度相比，骨骼运动与外部运动之间的差异较大。相对于跑步姿势期间的运动范围的平均误差是：弯曲/伸展为21％，内/外旋转为63％，外展/内收为70％。错误是高度依赖主题的，从而无法实现成功的校正算法。结论是，使用皮肤标记物时，除屈曲/伸展以外的膝盖旋转可能会受到严重误差的影响。 （C）1997 Elsevier Science Ltd. [参考：18]

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