Methods for dynamic characterization of the major muscles activating the lower limb joints in cycling motion


Submitted: 31 March 2014
Accepted: 31 March 2014
Published: 2 April 2014
Abstract Views: 1568
PDF: 1401
Publisher's note
All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.

Authors

  • Navit Roth Department of Biomedical Engineering, Technion, Israel Institute of Technology, Haifa, Israel.
  • Avi Wiener Institute of Preventive Occupational Medicine, Rambam Medical Center, Haifa, Israel.
  • Joseph Mizrahi Department of Biomedical Engineering, Technion, Israel Institute of Technology, Haifa, Israel.
The functional activation, through electrical stimulation, of the lower limb consisting of several deficient muscles requires well-patterned and coordinated activation of these muscles. This study presents a method for characterizing the parameters of the major muscle groups controlling the ankle and knee joints in cycling motion, the latter having particular significance in the rehabilitation of locomotion. To lower mechanical indeterminacy in the joints the system is reduced by grouping the muscles acting in synergism. The joint torques were calculated by inverse dynamics methods from cycling motion data, including kinematics and foot/pedal reaction loads (forces, moments). The mechanical indeterminacy was resolved by applying optimization criteria and the individual muscle torques were parceled-out from the joint torques. System identification of the individual muscles, part of which being bi-articular, in this non-isometric condition was performed from the relationship between the evaluated force and the measured EMG of each the muscles, using both first and second order linear transfer functions. Feasibility of the presented method was demonstrated through the computation of the coefficients of the muscles involved and validating the results on the experimental data obtained from one subject.

Roth, N., Wiener, A., & Mizrahi, J. (2014). Methods for dynamic characterization of the major muscles activating the lower limb joints in cycling motion. European Journal of Translational Myology, 24(3). https://doi.org/10.4081/ejtm.2014.3317

Downloads

Download data is not yet available.

Citations