Using orientation statistics to investigate variations in human kinematics
Using orientation statistics to investigate variations in human kinematics
复制标题
使用方向统计来研究人体运动学的变化
DOI：
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复制
发表时间：
2000
期刊：
影响因子：
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通讯作者：
Jérôme Asselin
中科院分区：
文献类型：
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作者：
Denis Rancourt;Louis;Jérôme Asselin
本文应用方位统计方法研究了人体在垂直平板上进行6种不同位置训练时上肢姿势的变化。一些钻井位置在运动学上是等效的，因为这些位置可以使用相同的姿势。上肢姿势是通过记录受试者手、前臂、手臂和躯干上四个标记的坐标来测量的。3×3的旋转表示一个躯干分段相对于另一个躯干分段的相对方向。由于每个受试者在同一地点进行了五次钻探，因此可以进行复制。通过旋转的单因素方差分析检验，比较了六个钻井位置的上肢姿势。这些测试依赖于样本估计模式旋转时的切线空间近似。用单位四元数表示的旋转参数简化了计算。分析发现，所有成对的钻探地点之间的姿势存在显著差异。对于运动学上等价的位置对，得到了最小的变化，所有关节上的变化小于10°。对这些发现的生物力学解释进行了简短的讨论。
This paper applies orientation statistics to investigate variations in upper limb posture of human subjects drilling at six different locations on a vertical panel. Some of the drilling locations are kinematically equivalent in that the same posture could be used for these locations. Upper limb posture is measured by recording the co‐ordinates of four markers attached to the subjects hand, forearm, arm and torso. A 3×3 rotation characterizes the relative orientation of one body segment with respect to another. Replicates are available since each subject drilled at the same location five times. Upper limb postures for the six drilling locations are compared by one‐way analysis‐of‐variance tests for rotations. These tests rely on tangent space approximations at the estimated modal rotation of the sample. A parameterization of rotations in terms of unit quaternions simplifies the computations. The analysis detects significant differences in posture between all pairs of drilling locations. The smallest changes, less than 10° at all joints, are obtained for the kinematically equivalent pairs of locations. A short discussion of the biomechanical interpretation of these findings is presented.