Mechanical System Design Laboratory, Ecole Militaire Polytechnique, Boite Postale 17, Commune de Bordj El Bahri, 16046, Algiers, Algeria.
Université Sorbonne Paris Nord, CSPBA-LBPS, UMR CNRS 7244, Inst Galilee, 99 Ave JB Clement, Villetaneuse, France.
Ann Biomed Eng. 2023 May;51(5):1079-1093. doi: 10.1007/s10439-023-03189-y. Epub 2023 Apr 6.
Muscle structure is an essential component in typical computational models of the musculoskeletal system. Almost all musculoskeletal models represent muscle geometry using a set of line segments. The straight-line approach limits models' ability to accurately predict the paths of muscles with complex geometry. This approach needs knowledge of how the muscle changes shape and interacts with fundamental structures like muscles, bones, and joints that move. Moreover, the moment arms are supposed to be equivalent to all the fibers in the muscle. This study aims to create a shoulder musculoskeletal model that includes complex muscle geometries. We reconstructed the shape of fibers in the entire volume of six muscles adjacent to the shoulder using an automated technique. This method generates many fibers from the surface geometry of the skeletal muscle and its attachment areas. Highly discretized muscle representations for all muscles were created and used to simulate different shoulder movements. The moment arms of each muscle were calculated and validated against cadaveric measurements and models of the same muscles from the literature. We found that simulations using the developed musculoskeletal models generated more realistic geometries, which expands the physical representation of muscles compared to line segments. The shoulder musculoskeletal model with complex muscle geometry is created to increase the anatomical reality of models and the lines action of muscle fibers, and to be used for finite element investigations.
肌肉结构是肌肉骨骼系统典型计算模型的重要组成部分。几乎所有的肌肉骨骼模型都使用一组线段来表示肌肉的几何形状。直线方法限制了模型准确预测具有复杂几何形状的肌肉路径的能力。这种方法需要了解肌肉如何改变形状，并与肌肉、骨骼和关节等基本结构相互作用，这些结构会发生运动。此外，力臂应该与肌肉中的所有纤维等效。本研究旨在创建一个包含复杂肌肉几何形状的肩部肌肉骨骼模型。我们使用自动化技术重建了肩部附近六个肌肉的整个体积中的纤维形状。该方法从骨骼肌的表面几何形状及其附着区域生成许多纤维。为所有肌肉创建了高度离散化的肌肉表示，并用于模拟不同的肩部运动。计算了每个肌肉的力臂，并针对尸体测量值和文献中相同肌肉的模型进行了验证。我们发现，使用开发的肌肉骨骼模型进行的模拟生成了更逼真的几何形状，与线段相比，这扩展了肌肉的物理表示。创建具有复杂肌肉几何形状的肩部肌肉骨骼模型是为了提高模型的解剖学真实性和肌肉纤维的线条动作，并用于有限元研究。
