Thoracoscapular muscle contributions to shoulder movement and work.

We developed a shoulder model with an accurate scapulothoracic joint and includes scapular muscles to drive its motion. We used the model to compute the work done by the thoracoscapular muscles during shrugging and arm elevation. We found that the bulk of the work done in upper-extremity tasks is performed by the largest muscles of the shoulder: trapezius, deltoids, pectoralis major, and serratus-anterior. Trapezius and serratus anterior prove to be important synergists in performing upward-rotation of the scapula. We show that the large thoracoscapular muscles do more work than glenohumeral muscles during arm-elevation tasks. The model, experimental data and simulation results are available herein. <br/><br/>This project includes the following software/data packages: <br/> <ul> <li> <a href="https://simtk.org/frs?group_id=1708#pack_2119">FrontiersPubMaterials </a> : The models, data and analyses to generate publication results from:Seth A, Dong M, Matias R and Delp SL. Muscle contributions to upper-extremity movement and work from a musculoskeletal model of the human shoulder. Frontiers in Neurorobotics, in review. </li> </ul>

本研究团队开发了一种肩部模型，该模型具有精确的肩胛胸关节，并包含肩胛肌以驱动其运动。我们利用该模型计算了在耸肩和举臂动作中，胸肩肌群所做的功。研究发现，上肢任务中大部分的功是由肩部最大的肌肉群——斜方肌、三角肌、胸大肌和前锯肌——完成的。斜方肌和前锯肌在肩胛骨上举旋转的动作中表现出重要的协同作用。实验结果显示，在举臂任务中，较大的胸肩肌群所做的功超过了肩关节盂肱肌。本模型、实验数据和仿真结果均在本研究中提供。此外，本项目包含以下软件/数据包：
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<li><a href="https://simtk.org/frs?group_id=1708#pack_2119">FrontiersPubMaterials</a> : 包含用于生成发表结果所必需的模型、数据和分析的资料：Seth A, Dong M, Matias R and Delp SL. Muscle contributions to upper-extremity movement and work from a musculoskeletal model of the human shoulder. Frontiers in Neurorobotics, in review.</li>
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