Stähelin T, Nigg B M, Stefanyshyn D J, van den Bogert A J, Kim S J
Human Performance Laboratory, Faculty of Kinesiology, The University of Calgary, Canada.
J Biomech. 1997 May;30(5):513-6. doi: 10.1016/s0021-9290(96)00187-x.
An experimental set-up has been developed to quantify motion of bone structures in the ankle joint complex of human cadaver specimens under conditions approximating physiological joint loading. The device allows to load the foot/leg specimen along the axis of the tibia, and muscle forces can be simulated by clamping the extrinsic tendons of the foot. Additionally, an axial moment can be applied to the tibia. A variety of foot movements can be induced by rotating a foot plate around an arbitrary axis in the horizontal plane. The input force which produces the movement at the foot is applied to the entire sole of the foot. A forefoot fixation allows for the natural adaptation of the midfoot and hindfoot which occurs during loading of the specimen. Bone pins were placed in the tibia, talus, calcaneus and navicular, and three reflective markers were attached to each pin in order to record the bone movements with a video system. Intersegmental rotations in the talo-crural, talo-calcaneal, and talo-navicular joints were calculated in three dimensions, compared for different loading and ligament integrity conditions, and related to a functionally/anatomically described foot position. Repeated measurements of relative bone orientations indicated a reproducibility better than 2 degrees; the slope of the curves, representing the kinematic coupling, was virtually identical between repetitions. It is proposed that this method simulates multidirectional AJC compression similar to loading situations during locomotion.
已经开发出一种实验装置，用于在接近生理关节负荷的条件下，量化人体尸体标本踝关节复合体中骨结构的运动。该装置可以沿着胫骨轴线对足/腿标本进行加载，并且可以通过夹紧足部的外在肌腱来模拟肌肉力量。此外，可以对胫骨施加轴向力矩。通过在水平面内绕任意轴旋转脚板，可以诱导出各种足部运动。在足部产生运动的输入力施加在整个脚底。前足固定允许在标本加载过程中中足和后足自然适应。在胫骨、距骨、跟骨和舟骨中放置骨针，并在每个骨针上附着三个反光标记，以便用视频系统记录骨运动。在三维空间中计算距小腿、距跟和距舟关节的节段间旋转，比较不同负荷和韧带完整性条件下的结果，并与功能/解剖学描述的足部位置相关联。相对骨取向的重复测量表明，再现性优于2度；代表运动耦合的曲线斜率在重复测量之间几乎相同。有人提出，这种方法模拟了类似于运动过程中负荷情况的多方向踝关节复合体压缩。
