A three-dimensional finite-element model of gluteus medius muscle incorporating inverse-dynamics-based optimization for simulation of non-uniform muscle contraction

Li, Junyan ORCID: https://orcid.org/0000-0003-4053-8334, Marra, Marco A., Verdonschot, Nico and Lu, Yongtao (2021) A three-dimensional finite-element model of gluteus medius muscle incorporating inverse-dynamics-based optimization for simulation of non-uniform muscle contraction. Medical Engineering and Physics, 87 . 38 - 44. ISSN 1350-4533 [Article] (doi:10.1016/j.medengphy.2020.11.009)

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Abstract

Non-uniform contraction exists in many skeletal muscles and plays an important role in the function of the musculoskeletal system. Particularly in the gluteus medius (GM) muscle, its three subdivisions appear activated differently while performing various motion tasks. However, the non-uniform contractile mechanism of GM is poorly understood. In this study, a three-dimensional finite element (FE) model of GM was developed. Non-uniform contraction patterns of the three subdivisions of GM during abduction, internal and external rotation were simulated through an inverse-dynamics-based optimization approach. A set of sensitivity studies were also undertaken to evaluate the influence of parameters including the cost function of optimization and dimension of GM subdivisions on the predicted non-uniform contraction and biomechanics of the muscle. Contraction across GM was found to be highly non-uniform during various motions. The whole GM was activated during abduction, whereas only the anterior and posterior subdivisions were primarily involved in internal and external rotation, respectively. The active contractile stress in a subdivision during abduction was increased if its proportion in GM was expanded. The cost functions of minimizing the sum of active contractile stresses squared/cubed provide similar qualitative predictions of the trend of results. This approach provides the methodological basis to enable simulation of non-uniform muscle contraction using 3D musculoskeletal models.

Item Type: Article
Keywords (uncontrolled): 3D finite element muscle model, Non-uniform muscle contraction, Gluteus medius, Optimization of muscle contraction, Musculoskeletal modelling
Research Areas: A. > School of Science and Technology > Natural Sciences > Biophysics and Bioengineering group
Item ID: 31439
Notes on copyright: © 2020. This author's accepted manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Useful Links:
Depositing User: Junyan Li
Date Deposited: 27 Nov 2020 09:45
Last Modified: 04 Feb 2021 20:11
URI: https://eprints.mdx.ac.uk/id/eprint/31439

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