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Related Experiment Video

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Human Gait Control Using Functional Electrical Stimulation Based on Controlling the Shank Dynamics.

Zohre Rezaee1, Hamid Reza Kobravi1

  • 1Research Center of Biomedical Engineering, Mashhad Branch, Islamic Azad University, Mashhad, Iran.

Basic and Clinical Neuroscience
|June 3, 2020
PubMed
Summary

A new intermittent controller effectively manages human shank movement during gait. This Functional Electrical Stimulation (FES) approach shows promising results for gait control, mimicking healthy subject dynamics.

Keywords:
GaitMuscle contraction IntroductionRehabilitationSpinal cord injuries

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Area of Science:

  • Biomechanics
  • Control Systems Engineering
  • Neurorehabilitation

Background:

  • Functional Electrical Stimulation (FES) for gait control remains a significant research challenge.
  • This study introduces a novel intermittent controller to regulate human shank movement dynamics during gait.

Purpose of the Study:

  • To design and evaluate an intermittent controller for precise human shank angle regulation during gait.
  • To demonstrate the controller's ability to mimic natural gait dynamics.

Main Methods:

  • Constructed a 3D phase space from healthy subject gait data.
  • Extracted three iterated sine-circle maps to capture shank movement dynamics.
  • Developed an intermittent fuzzy controller activated only when shank angle deviates from specific points defined by the maps.

Main Results:

  • Simulations on a two-joint musculoskeletal model were conducted.
  • The controller generated hip and knee joint trajectories closely resembling those of healthy individuals.
  • The model's output dynamics showed an intriguing similarity to recorded human gait data.

Conclusions:

  • The proposed intermittent control strategy demonstrates acceptable performance.
  • The observed similarity between human data and the controlled model supports the controller's efficacy in regulating gait.