An investigation of jogging biomechanics using the full-body lumbar spine model: Model development and validation.
An investigation of jogging biomechanics using the full-body lumbar spine model: Model development and validation.
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DOI：
10.1016/j.jbiomech.2016.02.046
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发表时间：
2016-05-03
影响因子：
2.4
通讯作者：
Chaudhari AMW
中科院分区：
文献类型：
--
作者：
Raabe ME;Chaudhari AMW
生物力学模拟产生能够转化为真实情况的结果的能力在很大程度上取决于肌肉骨骼模型的生理准确性。OpenSim中存在的自由可用的全身模型数量有限，而那些确实存在的模型在躯干肌肉和脊椎自由度方面非常有限。对躯干的运动和肌肉结构进行适当的建模是最准确地估计腿部和脊柱负荷所必需的。这项研究的目的是开发和验证一个更准确的生理OpenSim全身模型。通过建立之前开发的三个OpenSim模型，开发了由21个节段、30个自由度和324个肌腱执行器组成的全身腰椎(FBLS)模型。将5个腰椎建模为个体，并实施耦合约束来描述脊柱的净运动。对腰椎的8个主要肌群(腹直肌、外斜肌和内斜肌、竖脊肌、多裂肌、腰方肌、腰大肌和背阔肌)进行了建模，其中许多肌群被建模为多个肌群，允许大肌肉向多个方向活动。由此得到的FBLS模型的躯干肌肉几何形状、最大等距关节力矩和模拟的肌肉激活与实验数据吻合得很好。FBLS模型将免费提供(https://simtk.org/home/fullbodylumbar))，供其他人执行额外的分析和开发模拟，调查全身动力学和躯干肌肉对动态任务的贡献。
The ability of a biomechanical simulation to produce results that can translate to real-life situations is largely dependent on the physiological accuracy of the musculoskeletal model. There are a limited number of freely-available, full-body models that exist in OpenSim, and those that do exist are very limited in terms of trunk musculature and degrees of freedom in the spine. Properly modeling the motion and musculature of the trunk is necessary to most accurately estimate lower extremity and spinal loading. The objective of this study was to develop and validate a more physiologically accurate OpenSim full-body model. By building upon three previously developed OpenSim models, the Full-Body Lumbar Spine (FBLS) model, comprised of 21 segments, 30 degrees-of-freedom, and 324 musculotendon actuators, was developed. The five lumbar vertebrae were modeled as individual bodies, and coupled constraints were implemented to describe the net motion of the spine. The eight major muscle groups of the lumbar spine were modeled (rectus abdominis, external and internal obliques, erector spinae, multifidus, quadratus lumborum, psoas major, and latissimus dorsi), and many of these muscle groups were modeled as multiple fascicles allowing the large muscles to act in multiple directions. The resulting FBLS model's trunk muscle geometry, maximal isometric joint moments, and simulated muscle activations compare well to experimental data. The FBLS model will be made freely available (https://simtk.org/home/fullbodylumbar) for others to perform additional analyses and develop simulations investigating full-body dynamics and contributions of the trunk muscles to dynamic tasks.