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An Optimization-Based Simultaneous Approach to the Determination of Muscular, Ligamentous, and Joint Contact Forces Provides Insight into Musculoligamentous Interaction

机译:基于优化的同时确定肌肉,韧带和关节接触力的方法提供了对肌肉接触相互作用的洞察力

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摘要

Typical inverse dynamics approaches to the calculation of muscle, ligament, and joint contact forces are based on a step-wise solution of the equations of motion. This approach is therefore limited in its ability to provide insight as to the muscular, ligamentous, and articular interactions that create joint stability. In this study, a new musculoskeletal model of the lower limb is described, in which the equations of motion describing the force and moment equilibrium at the joints of the lower limb are solved simultaneously using optimization techniques. The new model was employed to analyze vertical jumping using a variety of different optimization cost functions and the results were compared to more traditional approaches. The new model was able to find a solution with lower muscular force upper bounds due to the ability of the ligaments to contribute to moment equilibrium at the ankle and knee joints. Equally, the new model produced lower joint contact forces than traditional approaches for cases which also included a consideration as to ligament or joint contact forces within the cost function. This study demonstrates the possibility of solving the inverse dynamic equations of motion simultaneously using contemporary technology, and further suggests that this might be important due to the complementary function of the muscles and ligaments in creating joint stability.
机译:计算肌肉,韧带和关节接触力的典型逆动力学方法是基于运动方程的逐步求解。因此,这种方法在提供有关产生关节稳定性的肌肉,韧带和关节相互作用方面的见识的能力受到限制。在这项研究中,描述了一种新的下肢肌肉骨骼模型,其中使用优化技术同时求解了描述下肢关节处的力和力矩平衡的运动方程。该新模型用于使用各种不同的优化成本函数来分析垂直跳跃,并将结果与​​更传统的方法进行了比较。由于韧带有助于踝关节和膝关节力矩平衡的能力,因此新模型能够找到具有较低肌肉力上限的解决方案。同样,对于案例,新模型产生的关节接触力比传统方法要低,该案例还考虑了成本函数内的韧带或关节接触力。这项研究证明了使用现代技术同时解决运动的逆动态方程的可能性,并且进一步表明,由于肌肉和韧带在创造关节稳定性方面的互补功能,这可能很重要。

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