Three-dimensional metacarpophalangeal joint kinematics using two markers on the phalanx
Three-dimensional metacarpophalangeal joint kinematics using two markers on the phalanx
复制标题
使用指骨上的两个标记的三维掌指关节运动学
DOI：
10.1243/0954411011535993
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
B. Zee
中科院分区：
文献类型：
--
作者：
A. Speirs;C. Small;J. T. Bryant;D. Pichora;B. Zee
摘要描述了一种利用近节指骨上的两个标志物分析活体三维掌指关节运动的方法。该分析使用了一个假设，即方阵绕其自身长轴的旋转为零。在一项实验研究中，24名志愿者将表面标记应用于他们的手、食指和长指近端指骨的背侧表面，并使用重测方案，以不完整的盒子设计，以两个手和手指的姿势记录三维标记位置。将光电子系统获得的运动学参数与三维重建骨标志物获得的运动学参数以及在立体X线片上确定的标志物位置进行比较。从骨骼标志物获得的旋前/旋后角显示出很高的重测变异性，反映出在没有植入标记的情况下，很难在小骨中获得可靠的旋前/旋后角度数据。用两种表面标志物测定的MCP关节伸展和偏斜角的变化与骨标志物获得的结果一致。结果表明，仅使用两个指骨标记就可以跟踪MCP关节运动的可重复性的方案，这表明可以应用“无旋转假设”而不影响正常关节的伸展和偏转运动的测量。
Abstract A protocol for analysing three-dimensional metacarpophalangeal (MCP) joint motion in vivo using two markers on the proximal phalanx is described. The analysis uses an assumption that the rotation of the phalanx about its own long axis is zero. In an experimental study 24 volunteers had surface markers applied to the dorsal surfaces of their hands and index and long finger proximal phalanges, with three-dimensional marker positions recorded in two hand and finger postures in an incomplete box design using a test-retest protocol. Kinematic parameters from the optoelectronic system were compared with those obtained from three-dimensional reconstruction of bone landmarks and of the marker positions identified on stereoradiographs. Pronation/supination angles obtained from bone landmarks showed high test-retest variability, reflecting the difficulty in obtaining reliable pronation/supination data in small bones without the use of implanted markers. Changes in MCP joint extension and deviation angles determined using two surface markers agree with those obtained from bone landmarks. The results indicate a reproducible protocol for tracking MCP joint motion using only two phalangeal markers, suggesting that the ‘no-rotation assumption’ can be applied without affecting measures of extension and deviation motion in the normal joint.