Biomechanical Modeling and Dynamic Graphic Simulation for the Shoulder Using Visual Interactive Musculoskeletal System (VIMS)

• Main Authors: Hwai-Ting Lin, 林槐庭
• Other Authors: Fong-Chin Su
• Format: Others
• Language: en_US
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/56570948336983643922

博士 === 國立成功大學 === 醫學工程研究所碩博士班 === 93 === 　The human shoulder joint allows movements in all degrees of freedom and is inherently unstable. Dynamic stability is maintained by the shoulder musculature and rotator cuff during various strenuous extrinsic activities. Due to the complex anatomy and large range of bone and joint movement, few investigations had attempted to develop a dynamic graphics shoulder musculoskeletal model in the past. In the muscle force analysis, previous studies restricted to a static analysis in one or few positions or some studies could be used to determine the dynamic muscle and ligament forces, but no prevision was given to accommodate muscle orientation changes during motion. Furthermore, it was difficult to visualize the 3D musculoskeletal model. A computer-graphics based visual interactive musculoskeletal system (VIMS), is not only in displaying the geometry relationship during the motion, but also in displaying the analyzed results. Therefore, the purposes of this proposed study were to analyze three-dimensional kinematics and kinetics in upper extremity using the developed technique and to animate the motion and display the force and moment during motion using the computer graphics model. A muscle contraction force analysis model in shoulder using physiological parameters and optimization analysis was developed. Moreover, this model was applied to predict muscle contraction forces during pitching and wheelchair propulsion for understanding muscle function and injury prevention during pitching and wheelchair propelling, respectively. The results showed that this system could completely animate the relative movements of all the musculoskeletal system in shoulder. The changes of muscle orientation and muscle moment arms during the baseball pitching and wheelchair propulsion demonstrated muscle would change its function with the change of arm position. Predictions of muscle forces and stresses help us to elucidate the muscle activities and muscle loading during these two activities. Higher muscle loading during the motion such as the latissimus dorsi and rotator cuffs in baseball pitching, and the infraspinatus and deltoid in wheelchair propulsion are prone to its related injury. This VIMS model is not only to provide the visualization of the musculoskeletal system during motion but also to give information about the muscle function, muscle activities and muscle loading. Hopefully, this system could also apply to study other activities involving shoulder motion to help athletes or people doing these activities reduce muscle injury possibility, and further enhance motion performance.