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New controller for functional electrical stimulation systems.

N Fisekovic1, D B Popovic

  • 1Phillips, Eindhoven, The Netherlands.

Medical Engineering & Physics
|September 12, 2001
PubMed
Summary
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A new functional electrical stimulation (FES) controller restores complex motor functions. This FES system enabled a paraplegic subject to walk faster with less effort using automatic control.

Area of Science:

  • Biomedical Engineering
  • Rehabilitation Engineering

Background:

  • Developing advanced controllers for functional electrical stimulation (FES) is crucial for restoring complex motor functions in individuals with disabilities.
  • Existing FES systems often lack versatility and ease of use, limiting their application in restoring functions like walking, standing, and grasping.

Observation:

  • A novel, self-contained controller was designed for FES systems, capable of regulating up to 16 channels and supporting diverse sensory inputs.
  • The controller features a user-friendly PC interface, memory for sensory data, and five timers for multi-modal movement control.
  • A case study demonstrated the controller's effectiveness in restoring walking for a paraplegic subject using surface electrodes and a rule-based control algorithm.

Findings:

  • The designed controller successfully regulated stimulation parameters (frequency, pulse duration, charge balance) for complex movements.

Related Experiment Videos

  • The implemented FES system, including the novel controller, enabled a paraplegic subject to walk faster and with reduced physiological effort compared to hand control.
  • The system integrated various sensors (goniometers, force-sensing resistors, accelerometers) for effective sensory-driven control.

    • Implications:

    • This novel controller offers a versatile and user-friendly solution for FES systems, potentially improving the quality of life for individuals with motor impairments.
    • The successful application in restoring walking highlights the potential of advanced FES control strategies for complex motor rehabilitation.
    • Further research and application of this controller could lead to broader restoration of motor functions, enhancing independence and mobility.