Zdravkovic V, Jacob H A, Sennwald G R
Chirurgie St. Leonhard, Clinic for Hand and Outpatient Surgery, St. Gallen, Switzerland.
J Hand Surg Br. 1995 Apr;20(2):159-64. doi: 10.1016/s0266-7681(05)80043-9.
The rotational stability of the proximal carpal row was tested on six unembalmed human cadaver hand specimens. The physiological load conditions were stimulated by loading the wrist flexor and extensor tendons. Pure torque was introduced to the lunate, scaphoid and triquetrum, one at a time, by means of a dynamometer wrench, forcing the bones loaded to perform a flexion-extension motion. A truly stable state of equilibrium could be found in the normal wrist only under axial load. A uni-directional coupling was observed through the scapho-lunate ligament as a counteraction to a tendency for the lunate to extend and the scaphoid to flex. The triquetrum and lunate moved together, showing close coupling in both directions. As conclusion: a stable wrist can be defined as one which, while being loaded within a physiological range of stress, does not deviate from a stable state of equilibrium (the ability to return to a single position when disturbed) at any point within the whole physiological range of motion.
在六个未经防腐处理的人类尸体手部标本上测试了近端腕骨排的旋转稳定性。通过加载腕屈肌腱和伸肌腱来模拟生理负荷条件。借助测力计扳手，依次对月骨、舟骨和三角骨施加纯扭矩，迫使加载的骨骼进行屈伸运动。只有在轴向负荷下，正常手腕才能找到真正稳定的平衡状态。通过舟月韧带观察到单向耦合，作为对月骨伸展和舟骨屈曲趋势的一种反作用。三角骨和月骨一起移动，在两个方向上都显示出紧密耦合。结论：稳定的手腕可以定义为在生理应力范围内加载时，在整个生理运动范围内的任何点都不会偏离稳定平衡状态（受干扰时能够恢复到单一位置的能力）的手腕。
