HANDLINK: A Dexterous Robotic Hand Exoskeleton controlled by Motor Imagery (MI)
Journal of Advances in Medicine and Medical Research,
Introduction: Over 5.6 million stroke survivors in the United States experience hemiparesis of the upper limb. Assistive devices are used to help regain upper limb functionality for affected individuals; however, existing devices are bulky, costly, and lack adaptability. The objective of this pilot study was to test the performance of a newly developed hand exoskeleton on a sample of individuals with hand impairment.
Methods: A hand exoskeleton was developed comprising of a novel linkage system with three four-bar linkages structures set up in a series and a novel algorithm that finds optimal Electroencephalogram (EEG) channels, through Common Spatial Pattern (CSP) Recognition, and classifies them with a stacked Linear Discriminant Analysis-Support Vector Machine (LDA-SVM) classifier. The functionality of the novel hand exoskeleton was tested by examining performance across a battery of hand mobility assessments among individuals in the experimental group with hand impairment (n=10) compared to controls (n=10).
Results: A paired-t test was used to show better performance for the experimental group with the exoskeleton compared to those without the exoskeleton across function, grip force, and range of motion measures. An unpaired-t test was used to show that there was no statistical difference in the mean performance of the experimental group with the exoskeleton compared to the control group for most measures, indicating that functionality with the exoskeleton is comparable to a healthy hand. The LDA-SVM classifier resulted in an 88% accuracy in classifying which finger the user intends to move with minimal latency as a result of its computational efficiency.
Conclusions: Findings suggest HANDLINK was effective in improving function, grip force, and range of motion among hand-impaired individuals. The HANDLINK, and its complementary stacked SVM-LDA classification algorithm, work as a viable solution for a fully adaptable and cost-effective assistive hand aide for individuals with paraplegia.
- Hand exoskeleton
- motor imagery
- upper body paralysis
- maestro robotic exoskeleton
How to Cite
Retrieved October 11, 2022.
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