Faculty of Kinesiology and Physical Education, University of Toronto, Toronto, ON, Canada.
Faculty of Kinesiology and Physical Education, University of Toronto, Toronto, ON, Canada.
J Biomech. 2023 Sep;158:111767. doi: 10.1016/j.jbiomech.2023.111767. Epub 2023 Aug 11.
Existing hip-focused musculoskeletal (MSK) models are limited by the hip range of motion, hip musculature detail, or have only been qualitatively validated. The purposes of this study were to: i) modify the existing 2396Hip MSK model to simulate dynamic tasks with multiplanar hip joint motion; and ii) validate the modified MSK model quantitatively against experimental data. Experimental data was collected from five healthy adults (age = 25 [6] years, two females) during eight movement tasks. The motion and ground reaction force data were input into the MSK modeling software OpenSim to calculate muscle activations and hip contact forces (HCFs). The HCFs were compared to experimental HCFs previously measured in total hip arthroplasty (THA) patients using instrumented hip prostheses. A gait simulation was performed using data from one THA patient to directly assess the model's accuracy in estimating HCFs. The young adults' modeled and experimental muscle activations for seven muscles were compared using a cross-correlation function. The model only overestimated the peak resultant HCFs by 0.06-0.08 N/BW compared to the experimentally measured HCFs of the THA patient. The young adults' HCFs were over two standard deviations higher than previously measured in the THA patients, which is likely a result of different movement patterns. The correlation coefficients indicated strong correlations between experimental and modeled muscle activations in 50 of the 56 comparisons. The results of this study suggest the new MSK model is an appropriate method to quantify HCFs and muscle activations in response to dynamic, multiplanar tasks among young, healthy adults.
现有的髋关节为中心的肌肉骨骼（MSK）模型受到髋关节运动范围、髋关节肌肉细节或仅进行定性验证的限制。本研究的目的是：i）修改现有的 2396Hip MSK 模型，以模拟具有多平面髋关节运动的动态任务；ii）使用实验数据对修改后的 MSK 模型进行定量验证。从五名健康成年人（年龄=25 [6]岁，两名女性）在八项运动任务中收集实验数据。运动和地面反力数据被输入到 MSK 建模软件 OpenSim 中，以计算肌肉激活和髋关节接触力（HCFs）。将 HCFs 与先前使用仪器化髋关节假体测量的全髋关节置换术（THA）患者的实验 HCFs 进行比较。使用一名 THA 患者的数据进行步态模拟，以直接评估模型在估计 HCFs 方面的准确性。通过交叉相关函数比较了模型和实验中 7 块肌肉的肌肉激活。与 THA 患者的实验 HCFs 相比，模型仅高估了峰值综合 HCFs 0.06-0.08 N/BW。年轻人的 HCFs 比之前在 THA 患者中测量的高出两个标准差，这可能是由于不同的运动模式造成的。相关系数表明，在 56 次比较中的 50 次中，实验和模型肌肉激活之间存在很强的相关性。这项研究的结果表明，新的 MSK 模型是一种定量分析年轻人健康成年人在动态、多平面任务中髋关节接触力和肌肉激活的合适方法。
