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EMG pattern recognition compared to foot control of the DEKA Arm
Linda J Resnik1,2, Frantzy Acluche1, Matthew Borgia1
1Research Department, Providence VA Medical Center, Providence, Rhode Island, United States of America.
For transradial amputees using the DEKA Arm, inertial measurement units (IMUs) offer better dexterity and performance than electromyography pattern recognition (EMG-PR) control. Further research is needed to improve EMG-PR systems.
Area of Science:
- Biomedical Engineering
- Rehabilitation Technology
- Prosthetics
Background:
- Advanced prosthetic control is crucial for restoring function in upper limb amputees.
- Electromyography pattern recognition (EMG-PR) and inertial measurement units (IMUs) are emerging control strategies for multi-degree-of-freedom (DOF) prosthetic arms.
- The DEKA Arm represents a sophisticated upper limb prosthesis requiring effective control methods.
Purpose of the Study:
- To evaluate the outcomes of EMG-PR and IMU control for the DEKA Arm compared to a user's personal prosthesis.
- To compare the effectiveness of EMG-PR versus IMU control for the DEKA Arm in amputee users.
Main Methods:
- A quasi-experimental, multi-site study with repeated measures was conducted.
- Thirty-six transradial (TR) and transhumeral (TH) amputees participated, using either EMG-PR or IMU control systems.
- Outcomes were assessed at baseline (personal prosthesis), after laboratory training, and after home use, comparing control types and amputation levels.
Main Results:
- The EMG-PR group showed increased prosthesis use but decreased dexterity and slower performance initially.
- The IMU group demonstrated slower initial performance but improved activity performance and reduced disability after home use.
- Transradial amputees using EMG-PR exhibited worse dexterity and activity performance compared to those using IMUs.
Conclusions:
- For transradial amputees using the DEKA Arm, IMU control appears more effective than the tested EMG-PR prototypes.
- Further refinement of EMG-PR systems is necessary for successful application in multi-DOF prosthetic devices.
- Future research should investigate a larger cohort of transhumeral amputees and advanced EMG-PR algorithms.
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