為了醫療器材及手動器具的研發，許多人致力於發展一套更準確且可靠的上肢肌肉骨骼模型。但在許多研究中，或因肩部的肩帶運動過於複雜而常為簡化而忽略之。然而肩帶對於上肢所做的各種動作卻扮演不可或缺的角色，實不應忽視之。而本研究的主要目的是建立一包含肩帶的肩部肌肉骨骼模型，並建立其運動、肌力及關節負荷分析等模式。
本研究使用一SSCP-S空間機構以模擬肩部骨骼系統，並以坐標轉換及迴路方程式建立其運動分析模式，接著推得手臂作外展動作時的位移分析閉合解。除了使用Hill肌肉模型，並以Obstacle-set方法為基礎，建立一肌肉路徑模型，其可用以分析肌肉路徑及肌肉長度。結合上述之模型，可進而建立一包含18條肌肉的肩部肌肉骨骼模型。
接著根據牛頓運動定律，建立了肌肉骨骼系統的靜力分析模式，並以二次規劃問題建立肌力之分析模式，最後建立考慮肌力作用時之關節力的分析模式。另外，以手臂作外展動作為實例，說明所建立各模式的使用及顯示各分析結果。
由所得結果可知，考慮肌力作用後，其關節負荷比不考慮時增加許多。此外，本文所提出的模型及建立的各種分析模式，應有助於進一步建立上肢更完整的模型；對於醫療器材、上肢輔具及手動器具等的研發亦應有其參考價值。

For the research and development of medical instruments and hand tools, many researchers have devoted themselves on developing a better and reliable musculoskeletal model of the human upper limb. But many of them chose to ignore the shoulder girdle might because it is too complicate to include. However, it plays such an important role in various activities of the upper limb, and should be considered within the model. Thus the main purposes of this study are to propose a musculoskeletal model of the shoulder complex including shoulder girdle, and to develop models for its motion, muscular force and joint loads analyses.
The SSCP-S spatial mechanism is proposed to simulate the skeletal model of the shoulder complex. The homogeneous coordinate transformation and loop-closure equation are applied to develop the kinematic analysis model; consequently, the closed form solution of the displacement analysis for arm abduction is derived. Hill-type muscular model is adopted. Based on the Obstacle-set method, the model for analyzing the muscle paths and muscle lengths is developed. Consequently, a musculoskeletal model, which includes 18 muscles, of the shoulder complex is built to consist the models developed. According to Newton’s law, the static analysis of the musculoskeletal system is also derived. The muscular force analysis is constructed as a quadratic programming problem. Finally, joint force analysis is derived with considering the muscular forces. Furthermore, the example of arm abduction is adopted to explain the usages of the models developed and to show the analysis results.
Based on the results, the joint forces are increased a lots due to the effects of the muscular forces. Moreover, the results of this study should have aids on further development of the musculoskeletal model of the upper limb, and on the design and development of the medical instruments, the upper limb assisting devices and hand tools.

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