Synergy-Driven Musculoskeletal Modeling to Estimate Muscle Excitations and Joint Moments at Different Walking Speeds in Individuals with Transtibial Amputation

Federica Damonte, Guillaume Durandau, Jose Gonzalez-Vargas, Herman Van Der Kooij, Massimo Sartori

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

The main requirement for an amputee is to regain the function of the lost limb. In order to fully benefit from powered prosthetic legs, the user must rely on the dynamic control of the device. Progress in high-level control for powered prosthetic legs is currently challenged by the inability of current control schemes to generalize to large repertoires of movements as well as adapting to external mechanical demands. This ultimately leads the user to adopt compensatory movements, lack of comfort, higher energy requirements during walking and standing. This study uses a feedforward model of muscle activation and force generation that applies mathematical formulations of muscle synergies to generate synthetic activation profiles underlying walking across different speeds. Estimated activation profiles are used to drive forward subject-specific numerical models of the lower extremity musculoskeletal system. The model was validated on one individual with uni-lateral transtibial amputation and its predictions were compared to experimental torques from inverse dynamic calculations. Results showed that a generic muscle synergy driven personalized musculoskeletal model can fit the ankle torques of the intact limb of a person with transtibial amputation (RMSD =0.1329± 0.02). The estimated moments might be suitable as the control signal to drive powered prostheses to ultimately improve physical interaction between the user and a powered prostheses during dynamic motor tasks.

Original languageEnglish
Title of host publication2023 International Conference on Rehabilitation Robotics, ICORR 2023
PublisherIEEE
Number of pages6
ISBN (Electronic)9798350342758
DOIs
Publication statusPublished - 8 Nov 2023
Event2023 International Conference on Rehabilitation Robotics, ICORR 2023 - Singapore, Singapore
Duration: 24 Sept 202328 Sept 2023

Publication series

NameIEEE International Conference on Rehabilitation Robotics
ISSN (Print)1945-7898
ISSN (Electronic)1945-7901

Conference

Conference2023 International Conference on Rehabilitation Robotics, ICORR 2023
Country/TerritorySingapore
CitySingapore
Period24/09/2328/09/23

Keywords

  • muscle synergies
  • musculoskeletal modeling
  • powered prosthetic legs
  • transtibial amputations
  • walking
  • 2023 OA procedure

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