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Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion
Published on: April 11, 2018
Consistency among musculoskeletal models: caveat utilitor.
David W Wagner1, Vahagn Stepanyan, James M Shippen
1Center for Tissue Regeneration, Repair, and Restoration, VA Palo Alto Health Care System, 3801 Miranda Ave., Palo Alto, CA 94304, USA. dwwagner@gmail.com
Annals of Biomedical Engineering
|June 19, 2013
Summary
Musculoskeletal models show significant variation in results, impacting biomechanical analysis. This inconsistency persists even with scaled models, highlighting a need for standardization in musculoskeletal modeling research.
Area of Science:
- Biomechanics
- Computational modeling
- Musculoskeletal analysis
Background:
- Musculoskeletal simulation software and model repositories have increased accessibility to biomechanical analysis.
- The growing recognition of musculoskeletal modeling as an engineering discipline necessitates consistent and reliable results across different models and software.
Purpose of the Study:
- To compare eight musculoskeletal models from three software packages.
- To evaluate differences in quadriceps moment arms, muscle forces, and tibiofemoral contact forces.
- To assess model consistency for an idealized knee-extension task from -125° to +10°.
Main Methods:
- Eight musculoskeletal models were analyzed across three distinct software packages.
- Key biomechanical parameters including moment arms, muscle forces, and joint contact forces were calculated.
- An idealized knee-extension task was simulated across a range of knee flexion angles.
Main Results:
- Substantial variations were observed in quadriceps moment arms, muscle forces, and tibiofemoral contact forces among the evaluated models.
- Model differences were influenced by knee angle, with better agreement at low to moderate flexion angles.
- Inconsistencies were not solely due to inter-individual variations or scaling differences.
Conclusions:
- Significant inconsistencies exist among musculoskeletal models and software packages.
- Standard scaling and recruitment algorithms are insufficient to ensure consistent biomechanical force predictions.
- Further standardization is required to improve the reliability of musculoskeletal modeling for engineering applications.
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