Leijnse J N
Department of Plastic and Reconstructive Surgery, Erasmus University, Rotterdam, The Netherlands.
J Biomech. 1997 Nov-Dec;30(11-12):1107-14. doi: 10.1016/s0021-9290(97)00091-2.
The present paper investigates the forces and the stresses in the lumbrical and the other finger motors in an unloaded human finger model, with and without the ab-adduction degree of freedom of the MCP joint. Unique solutions are obtained by minimization of the maximal muscle stress calculated with a normal and a variable lumbrical physiological cross-sectional area. It is concluded that in the model with biaxial MCP joint, a stronger than normal lumbrical is not useful in unloaded finger control, and will merely result in spare lumbrical capacity. Also the natural synergism of the lumbrical and the ulnar interosseus in the control of the finger in the sagittal plane is pointed out.
本文研究了在无负荷的人体手指模型中，有无掌指关节（MCP）内收外展自由度时，蚓状肌和其他手指运动肌中的力和应力情况。通过将正常和可变的蚓状肌生理横截面积计算出的最大肌肉应力最小化，获得了唯一解。得出的结论是，在具有双轴MCP关节的模型中，比正常更强的蚓状肌对无负荷手指控制并无帮助，只会导致蚓状肌能力过剩。还指出了蚓状肌和尺侧骨间肌在矢状面控制手指时的自然协同作用。
