Intelligent multifunction myoelectric control of hand prostheses

Intuitive myoelectric prosthesis control is difficult to achieve due to the absence of proprioceptive feedback, which forces the user to monitor grip pressure by visual information. Existing myoelectric hand prostheses form a single degree of freedom pincer motion that inhibits the stable prehension...

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Bibliographic Details
Published in:Journal of medical engineering & technology 2002-07, Vol.26 (4), p.139-146
Main Authors: Light, C. M., Chappell, P. H., Hudgins, B., Engelhart, K.
Format: Article
Language:English
Subjects:
Algorithms
Artificial Limbs
Biological and medical sciences
Biosensing Techniques - instrumentation
Biosensing Techniques - methods
Electromyography
Electronics, Medical - instrumentation
Feedback
Hand - physiopathology
Hand Strength
Humans
Medical sciences
Muscle, Skeletal - physiopathology
Neural Networks (Computer)
Prosthesis Design
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Summary:Intuitive myoelectric prosthesis control is difficult to achieve due to the absence of proprioceptive feedback, which forces the user to monitor grip pressure by visual information. Existing myoelectric hand prostheses form a single degree of freedom pincer motion that inhibits the stable prehension of a range of objects. Multi-axis hands may address this lack of functionality, but as with multifunction devices in general, serve to increase the cognitive burden on the user. Intelligent hierarchical control of multiple degree-of-freedom hand prostheses has been used to reduce the need for visual feedback by automating the grasping process. This paper presents a hybrid controller that has been developed to enable different prehensile functions to be initiated directly from the user's myoelectric signal. A digital signal processor (DSP) regulates the grip pressure of a new six-degree-of-freedom hand prosthesis thereby ensuring secure prehension without continuous visual feedback.
ISSN:0309-1902
1464-522X
DOI:10.1080/03091900210142459