Determination of the abduction-adduction axis of rotation at the human knee: helical axis representation.
Determination of the abduction-adduction axis of rotation at the human knee: helical axis representation.
复制标题
人类膝盖外展-内收旋转轴的确定：螺旋轴表示。
DOI：
10.1002/jor.20281
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Francis,MatthewJ
中科院分区：
文献类型：
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作者：
Dhaher,YasinY;Francis,MatthewJ
本研究使用有限螺旋轴表示法，推导出人体膝关节在静息和非负重状态下的中立屈伸姿势在额面上的旋转轴。通过伺服运动系统被动内收/外展小腿，计算出胫骨相对于股骨的三维有限螺旋轴路径。利用主动标记器运动学跟踪系统捕捉由于位置扰动而导致的膝关节运动。与在类似实验范式下进行的研究中使用的传统假设相反，我们的结果表明，膝关节中心，即有限螺旋轴和股骨远端中冠面之间的交点，位于股骨切迹内，外展和内收角范围很大(6°外展到6°内收)。我们的数据还表明，在膝关节的中性姿势下，螺旋轴的方向随着外展/内收扰动角的变化而变化。这些发现不仅对关节力矩计算过程中的误差最小化至关重要，而且还有助于从生物力学的角度对股四头肌和髌股关节力学在膝关节内侧向稳定性中的作用进行新的解释。©2006矫形外科研究会。由Wiley期刊出版公司J Orthop Res出版
This study used a finite helical axes representation to derive the axis of rotation of the human knee in the frontal plane for the neutral flexion/extension posture during resting and no load‐bearing conditions. The three‐dimensional finite helical axis pathway of the tibia relative to the femur was computed by passively adducting/abducting the lower limb via a servomotor system. Knee joint movements as a result of the positional perturbations were captured with an active marker kinematic tracking system. Contrary to traditional assumptions used in studies conducted under a similar experimental paradigm, our results indicated that the knee joint center, defined as the intercept point between the finite helical axis and the mid‐coronal plane of the distal femur, was located within the femoral notch for a wide range of abduction and adduction angles (6° abduction to 6° adduction angles). Our data also indicated that at the neutral posture of the knee, the helical axes directions change as a function of the abduction/adduction perturbation angle. These findings are not only essential to error minimization during joint moment calculations, but can also facilitate new biomechanical interpretations of, for example, the functional role of the quadriceps and patellofemoral joint mechanics to overall knee stability in the medial–lateral direction. © 2006 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res