Whole Body Center of Mass Feedback in a Reflex-Based Neuromuscular Model Predicts Ankle Strategy During Perturbed Walking
| Autor: | T. J. H. Brug, E.H.F. van Asseldonk, H. van der Kooij, Amy R. Wu, Arvid Q.L. Keemink |
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| Přispěvatelé: | Biomechanical Engineering |
| Rok vydání: | 2021 |
| Předmět: |
Computer science
Biomedical Engineering Walking Kinematics Feedback Inverse dynamics Neuromuscular control Gait (human) Control theory Reflex Internal Medicine medicine Humans Torque Gait Orthotics Prosthetics General Neuroscience Rehabilitation Work (physics) Reflex modeling Orthotic device Biomechanical Phenomena Human gait medicine.anatomical_structure Quality of Life Ankle Ankle Joint |
| Zdroj: | IEEE transactions on neural systems and rehabilitation engineering, 29, 2521-2529. IEEE |
| ISSN: | 1558-0210 1534-4320 |
| DOI: | 10.1109/tnsre.2021.3131366 |
| Popis: | Active prosthetic and orthotic devices have the potential to increase quality of life for individuals with impaired mobility. However, more research into human-like control methods is needed to create seamless interaction between device and user. In forward simulations the reflex-based neuromuscular model (RNM) by Song and Geyer shows promising similarities with real human gait in unperturbed conditions. The goal of this work was to validate and, if needed, extend the RNM to reproduce human kinematics and kinetics during walking in unperturbed and perturbed conditions. The RNM was optimized to reproduce joint torque, calculated with inverse dynamics, from kinematic and force data of unperturbed and perturbed treadmill walking of able-bodied human subjects. Torques generated by the RNM matched closely with torques found from inverse dynamics analysis on human data for unper-turbed walking. However, for perturbed walking the modulation of the ankle torque in the RNM was opposite to the modulation observed in humans. Therefore, the RNM was extended with a control module that activates and inhibits muscles around the ankle of the stance leg, based on changes in whole body center of mass velocity. The added module improves the ability of the RNM to replicate human ankle torque response in response to perturbations. This reflex-based neuromuscular model with whole body center of mass velocity feedback can reproduce gait kinetics of unperturbed and perturbed gait, and as such holds promise as a basis for advanced controllers of prosthetic and orthotic devices. |
| Databáze: | OpenAIRE |
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