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Updated: Feb 2, 2026
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Published on: September 1, 2023
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An Asynchronous Control Paradigm Based on Sequential Motor Imagery and Its Application in Wheelchair Navigation
Summary
This study introduces a new brain-computer interface control method using sequential motor imagery (sMI) for wheelchair navigation. The asynchronous control paradigm achieved a 94.2% success rate in real-world wheelchair tests.
Area of Science:
- Biomedical Engineering
- Neuroscience
- Rehabilitation Technology
Background:
- Brain-computer interfaces (BCIs) offer potential for assistive devices.
- Current BCIs often lack intuitive and rich control schemes.
- Motor imagery (MI) is a common BCI control modality.
Purpose of the Study:
- To propose and evaluate an asynchronous control paradigm using sequential motor imagery (sMI).
- To enhance control commands for motor imagery-based BCIs.
- To assess the feasibility and performance of sMI for wheelchair navigation.
Main Methods:
- Developed an asynchronous control paradigm based on sequential motor imagery (sMI).
- Encoded four sMI tasks (sequential left- and right-hand movements) into six wheelchair steering functions.
- Conducted simulated and online wheelchair navigation experiments with seven subjects.
Main Results:
- The sMI paradigm enabled control of forward movement, turning, acceleration, deceleration, and stopping.
- Subjects successfully completed 99 out of 105 experimental trials.
- Achieved a high success rate of 94.2% in online wheelchair navigation.
Conclusions:
- The proposed asynchronous sMI control paradigm is practical and effective for wheelchair navigation.
- This approach significantly enriches control commands for MI-based BCIs.
- Demonstrated the potential of advanced BCIs for enhancing mobility and independence.
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