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Therapy Interventions for Upper Limb Amputees Undergoing Selective Nerve Transfers

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Feedback control of functional electrical stimulation for arbitrary upper extremity movements.

Reza Sharif Razavian, Borna Ghannadi, John McPhee

IEEE ... International Conference on Rehabilitation Robotics : [Proceedings]

|August 18, 2017

Summary

This study introduces a novel feedback controller for functional electrical stimulation (FES) to restore arm movement. The system accurately controls 2D arm movements, achieving high precision for individuals with loss of voluntary motor control.

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Area of Science:

Neuroscience
Biomedical Engineering
Robotics

Background:

Functional electrical stimulation (FES) is a neuroprosthetic method to restore movement by electrically stimulating muscles.
Controlling FES to generate precise movements is a significant challenge in neurorehabilitation.
Existing methods often struggle with reliable and adaptable movement generation.

Purpose of the Study:

To present a novel feedback controller for FES systems.
To enable precise control of arm movements in a 2D task space.
To leverage human motor control models for improved FES performance.

Main Methods:

Developed a feedback controller for FES based on a human motor control model.
Integrated muscle synergies to simplify control calculations and enhance performance.
Implemented and tested the controller in a 2D (table-top) task space experiment.

Main Results:

The FES feedback controller successfully generated arbitrary arm movements in the 2D space.
Experimental results demonstrated high accuracy, with hand position errors under 2 cm from target locations.
The use of muscle synergies improved the overall control performance.

Conclusions:

The proposed FES feedback control scheme is effective for restoring 2D arm movements.
This approach offers a promising solution for individuals with impaired voluntary motor control.
The integration of motor control models and muscle synergies advances FES technology.