Dept. of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA, USA.
Dept. of Physical Medicine and Rehabilitation, Harvard Medical School, Cambridge, MA, USA.
J Biomech. 2024 Sep;174:112260. doi: 10.1016/j.jbiomech.2024.112260. Epub 2024 Aug 8.
Multisegmented foot models (MSFMs) are used to capture data of specific regions of the foot instead of representing the foot as a single, rigid segment. It has been documented that different MSFMs do not yield the same joint kinematic data, but there is little information available regarding their use for kinetic analysis. We compared the moment and power at the tibiotalar, midtarsal, and metatarsophalangeal joints of four MSFMs using motion capture data of young adult runners during stance phase of barefoot walking and jogging. Of these models, three were previously validated: the Oxford, Milwaukee, and Ghent Foot Models. One model was developed based upon literature review of existing models: the "Vogel" model. We performed statistical parametric mapping comparing joint measurements from each model to the corresponding results from the Oxford model, the most heavily studied MSFM. We found that the Oxford, Milwaukee, Vogel, and Ghent Foot Models do not provide the same kinetic results. The differences in segment definitions impact the degrees of freedom in a manner that alters the measured kinematic function of the foot, which in turn impacts the kinetic results. The results of this study capture the variability in performance of MSFMs as it relates to kinetic outcomes and emphasize a need to remain aware of model differences when interpreting results.
多分段足模型（MSFM）用于获取足部特定区域的数据，而不是将足部表示为单个刚性段。已经有文献记录表明，不同的 MSFM 不会产生相同的关节运动学数据，但关于它们在动力学分析中的应用的信息却很少。我们使用运动捕捉数据比较了在赤脚行走和慢跑的站立阶段，四个 MSFM 在距下关节、中跗关节和跖趾关节处的力矩和功率。这些模型中，有三个已经过验证：牛津、密尔沃基和根特足模型。一个模型是根据现有模型的文献综述开发的：“Vogel”模型。我们进行了统计参数映射，将每个模型的关节测量值与最广泛研究的 MSFM 牛津模型的相应结果进行比较。我们发现，牛津、密尔沃基、Vogel 和根特足模型不能提供相同的动力学结果。节段定义的差异以改变足部运动学功能的自由度的方式影响测量的运动学功能，进而影响动力学结果。本研究的结果捕获了 MSFM 在与动力学结果相关的性能变异性，并强调在解释结果时需要注意模型差异。
