Leijnse J N
Department of Plastic and Reconstructive Surgery, Erasmus University, Rotterdam, Netherlands.
J Biomech. 1996 Mar;29(3):355-66. doi: 10.1016/0021-9290(95)00012-7.
In this paper a model is presented which visualises the biomechanical functioning of the loaded and unloaded theree-tendon bi-articular chain. This model allows to graphically determine in any position of the chain (i) the exact ranges of loads which can be sustained by the different motors; (ii) the motors forces; (iii) the feasibility of the (unloaded) equilibrium; and (iv) the conditions for the good controllability of the bi-articular chain. These results are applied to the proximal three-motor bi-articular chain of the human finger, when controlled by the superficial flexor, interosseus, and extensor only. It is shown that (i) the anatomic position of the superficial flexor and extensor is a prime determinant in the good functioning of this chain; (ii) the proximal bi-articular chain of the human finger can well sustain certain flexion loads but is structurally weak for extension loads; and (iii) the chain is not optimally controllable.
本文提出了一个模型，该模型可视化了加载和未加载的三腱双关节链的生物力学功能。该模型允许以图形方式确定链在任何位置时：(i) 不同肌肉能够承受的精确负荷范围；(ii) 肌肉力量；(iii)（未加载时）平衡的可行性；以及 (iv) 双关节链良好可控性的条件。当仅由浅屈肌、骨间肌和伸肌控制时，这些结果应用于人类手指的近端三肌肉双关节链。结果表明：(i) 浅屈肌和伸肌的解剖位置是该链良好功能的主要决定因素；(ii) 人类手指的近端双关节链能够很好地承受一定的屈曲负荷，但在伸展负荷下结构较弱；以及 (iii) 该链的可控性并非最佳。
