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- W4387624013 abstract "Muscle forces and joint moments estimated by electromyography (EMG)-driven musculoskeletal models are sensitive to the wrapping surface geometry defining muscle-tendon lengths and moment arms. Despite this sensitivity, wrapping surface properties are typically not personalized to subject movement data. This study developed a novel method for personalizing OpenSim cylindrical wrapping surfaces during EMG-driven model calibration. To avoid the high computational cost of repeated OpenSim muscle analyses, the method uses two-level polynomial surrogate models. Outer-level models specify time-varying muscle-tendon lengths and moment arms as functions of joint angles, while inner-level models specify time-invariant outer-level polynomial coefficients as functions of wrapping surface parameters. To evaluate the method, we used walking data collected from two individuals post-stroke and performed four variations of EMG-driven lower extremity model calibration: (1) no calibration of scaled generic wrapping surfaces (NGA), (2) calibration of outer-level polynomial coefficients for all muscles (SGA), (3) calibration of outer-level polynomial coefficients only for muscles with wrapping surfaces (LSGA), and (4) calibration of cylindrical wrapping surface parameters for muscles with wrapping surfaces (PGA). On average compared to NGA, SGA reduced lower extremity joint moment matching errors by 31%, LSGA by 24%, and PGA by 12%, with the largest reductions occurring at the hip. Furthermore, PGA reduced peak hip joint contact force by 47% bodyweight, which was the most consistent with published in vivo measurements. The proposed method for EMG-driven model calibration with wrapping surface personalization produces physically realistic OpenSim models that reduce joint moment matching errors while improving prediction of hip joint contact force." @default.
- W4387624013 created "2023-10-14" @default.
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- W4387624013 date "2023-01-01" @default.
- W4387624013 modified "2023-10-15" @default.
- W4387624013 title "EMG-driven Musculoskeletal Model Calibration with Wrapping Surface Personalization" @default.
- W4387624013 doi "https://doi.org/10.1109/tnsre.2023.3323516" @default.
- W4387624013 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37831559" @default.
- W4387624013 hasPublicationYear "2023" @default.
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