A Stand-Alone Intraoral Tongue-Controlled Computer Interface for People With Tetraplegia

The intraoral Tongue Drive System (iTDS) is an embedded wireless tongue-operated assistive technology developed for people with tetraplegia to provide them a higher level of independence in performing daily living tasks, such as accessing computers, smartphones, and driving wheelchairs. The iTDS was...

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Bibliographic Details
Published in:IEEE transactions on biomedical circuits and systems Vol. 13; no. 5; pp. 848 - 857
Main Authors: Kong, Fanpeng, Sahadat, Md. Nazmus, Ghovanloo, Maysam, Durgin, Gregory D.
Format: Journal Article
Language:English
Published: United States IEEE 01.10.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Adult
Algorithms
Antennas
Assistive technology
brain-tongue computer interface (BTCI)
Commands
Computers
Dentistry
Embedded systems
Humans
Information transfer
information transfer rate (ITR)
intraoral
Magnetic sensors
Magnetometers
Male
Mouth
Pattern recognition
Quadriplegia
Self-Help Devices
Teeth
Tongue
Typing
typing error rate
User-Computer Interface
Wheelchairs
Wireless communication
Wireless Technology
ISSN:1932-4545, 1940-9990, 1940-9990
Online Access:Get full text
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Summary:The intraoral Tongue Drive System (iTDS) is an embedded wireless tongue-operated assistive technology developed for people with tetraplegia to provide them a higher level of independence in performing daily living tasks, such as accessing computers, smartphones, and driving wheelchairs. The iTDS was built as an arch-shaped dental retainer hermetically sealed and placed in the buccal shelf area of the mouth, completely hidden from sight. To provide high level of comfort, the iTDS is customized based on the users' oral anatomy to stably fix onto the lower teeth. We have presented a standalone version of the iTDS, capable of recognizing tongue gestures/commands by processing raw magnetic sensor data with a built-in pattern recognition algorithm in real time. The iTDS then sends the commands out in 10-b packets through a custom-designed high-gain intraoral antenna at 2.4 GHz to an external receiver. To evaluate the standalone iTDS performance, four subjects performed a computer access task by issuing random tongue commands over five sessions. Subjects completed 99.2% of the commands, and achieved an information transfer rate of 150.1 b/min. Moreover, a new typing method, designed specifically for the iTDS, resulted in typing at a rate of 3.76 words/min and error rate of 2.23%.
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ISSN:1932-4545
1940-9990
1940-9990
DOI:10.1109/TBCAS.2019.2926755