Examining Muscle Forces during Sit to Stand Transfer with Full Body Model 2016

Our STS transfer analysis required a three-dimensional musculoskeletal model that had lower extremities, flexibility in the lumbar vertebrae, and arms. Capturing the dynamics of the lower back and arms was critical for 1) ensuring more dynamically accurate calculations of muscle forces and induced accelerations and 2) developing benchmark simulations for young healthy adults using a model that could be applied in future studies to capture possible compensatory strategies (e.g., the use of arms or torso) in various populations completing the STS transfer. Because no previously developed model met these criteria, we created a three-dimensional musculoskeletal model, the Full Body Model 2016, by combining these models: Lower Limb Model 2010, Musculoskeletal Model of the Lumbar Spine, MoBL-ARMS Upper Limb Model, and Head and Neck Musculoskeletal Biomechanics Model. It has 46 degrees of freedom with 194 Hill-type muscle-tendon actuators. A description of how the model was assembled and evaluated is in Appendix 1 of our manuscript, Muscle Forces and Their Contributions to Vertical and Horizontal Acceleration of the Center of Mass during Sit-to-Stand Transfer in Young, Healthy Adults (see publications). Watch this video to get a sneak peek of STS transfer simulation with the Full Body Model 2016. <a href="http://www.youtube.com/v/j-o94qfJKvM&showsearch=0&fs=1&rel=0&autoplay=0&ap=%2526fmt%3D18">http://www.youtube.com/v/j-o94qfJKvM&showsearch=0&fs=1&rel=0&autoplay=0&ap=%2526fmt%3D18</a><br /><a href="http://www.youtube.com/watch?v=j-o94qfJKvM" target="_blank">View on YouTube</a> <br/><br/>This project includes the following software/data packages: <br/> <ul> <li> <a href="https://simtk.org/frs?group_id=951#pack_1596">osufullbody_sts </a> : This download includes the Full Body Model 2106 (.osim) and its geometry files. </li> <li> <a href="https://simtk.org/frs?group_id=951#pack_2115">Sample STS Transfer Data </a> : marker and force plate data for a few of the subjects that were a part of this STS transfer study </li> </ul>

本研究的STS转移分析 necessitated一个具备下肢、腰部椎骨灵活性以及上肢的三维肌肉骨骼模型。捕捉下背部与上肢的动态特性对于以下两方面至关重要：一是确保肌肉力量与诱导加速度的计算更加动态精准；二是构建适用于年轻健康成年人的基准模拟，该模型能够应用于未来的研究以捕捉不同人群在完成STS转移时的可能补偿策略（例如，利用上肢或躯干）。鉴于先前开发的模型未能满足这些标准，我们通过融合以下模型创建了三维肌肉骨骼模型——2016年全身体模：2010年下肢模型、腰部脊柱肌肉骨骼模型、MoBL-ARMS上肢模型以及头部和颈部肌肉骨骼生物力学模型。该模型拥有46个自由度，并配备了194个希尔型肌肉-肌腱驱动器。关于该模型组装与评估的描述详见我们手稿的附录1——《在年轻健康成年人中，坐至站立转移过程中肌肉力量及其对质心垂直和水平加速度的贡献》（参见出版物）。观看此视频以一窥2016年全身体模在STS转移模拟中的应用。<a href="http://www.youtube.com/v/j-o94qfJKvM&showsearch=0&fs=1&rel=0&autoplay=0&ap=%2526fmt%3D18">http://www.youtube.com/v/j-o94qfJKvM&showsearch=0&fs=1&rel=0&autoplay=0&ap=%2526fmt%3D18</a><br /><a href="http://www.youtube.com/watch?v=j-o94qfJKvM" target="_blank">在YouTube上查看</a> <br/><br/>本课题涉及以下软件/数据包： <br/> <ul> <li> <a href="https://simtk.org/frs?group_id=951#pack_1596">osufullbody_sts </a> ：本下载包含2016年全身体模 (.osim) 及其几何文件。</li> <li> <a href="https://simtk.org/frs?group_id=951#pack_2115">Sample STS Transfer Data </a> ：包含本STS转移研究中部分受试者的标记和力板数据。</li> </ul>