Wireless wearable controller for upper-limb neuroprosthesis

The objective of this project was to develop a wireless, wearable joint angle transducer to enable proportional control of an upper-limb neuroprosthesis by wrist position. Implanted neuroprostheses use functional electrical stimulation to provide hand grasp to individuals with tetraplegia. Wrist pos...

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Bibliographic Details
Published in:Journal of rehabilitation research and development 2009-01, Vol.46 (2), p.243-256
Main Authors: Wheeler, Christa A, Peckham, P Hunter
Format: Article
Language:English
Subjects:
Accuracy
Arm - innervation
Biomedical Engineering
Electric Stimulation Therapy
Electrodes, Implanted
Feasibility studies
Hand Strength
Humans
Implants, Artificial
Prosthesis
Prosthesis Design
Quadriplegia - rehabilitation
Quality of life
Sensors
Specifications
Spinal cord injuries
Technological change
Transducers
Wireless communications
Wrist
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Summary:The objective of this project was to develop a wireless, wearable joint angle transducer to enable proportional control of an upper-limb neuroprosthesis by wrist position. Implanted neuroprostheses use functional electrical stimulation to provide hand grasp to individuals with tetraplegia. Wrist position is advantageous for control because it augments the tenodesis grasp and can be implemented bilaterally. Recently developed, fully implantable multichannel stimulators are battery-powered and use wireless telemetry to control stimulator outputs. An external wrist controller was designed for command signal acquisition for people with cervical-level spinal cord injury to control this implantable stimulator. The wearable controller, which uses gigantic magnetoresistive sensing techniques to measure wrist position, is worn on the forearm. A small dime-sized magnet is fixed to the back of the hand. Results indicate that the device is a feasible control method for an upper-limb neuroprosthesis and could be reduced to a small "wristwatch" size for cosmesis and easy donning.
ISSN:0748-7711
1938-1352
DOI:10.1682/JRRD.2008.03.0037