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Tongue Drive System  (Source: GIT)
System allows users to control as many functions as they can remember with the tongue

People with high-level spinal cord injuries typically lose control of their arms and legs meaning they can no longer get around without some sort of adaptive assistance device. Quadriplegics have long relied on a type of control system for electric wheelchairs called the sip-and-puff system.

This type of control system allowed the user to move forward and backwards in an electric wheelchair by sipping a straw or blowing into it. A group of researchers at the Georgia Institute of Technology (GIT) has devised a new method of controlling a power chair for those who no longer had functionality in their arms and legs. The new system uses the patient’s tongue to control the chair or to control the mouse cursor on a computer screen.

Maysam Ghovanloo, an assistant professor in the School of Electrical and Computer Engineering at GIT said, "This clinical trial has validated that the Tongue Drive system is intuitive and quite simple for individuals with high-level spinal cord injuries to use. Trial participants were able to easily remember and correctly issue tongue commands to play computer games and drive a powered wheelchair around an obstacle course with very little prior training."

The clinical trial was conducted at the Shepherd Center in Atlanta and involved the attachment of a small magnet, roughly the size of a grain of rice, to the tongue of the patient with a tissue adhesive. The magnet was used as a tracer to allow the magnetic field sensors to register its movements. The users of the system wore sensors that look like headphones on the head to track the magnet.

The researchers say that the nerve that controls the tongue in patients with high-level spinal injury is typically not affected in the injury. Software translates the movement of the magnet into motion for the chair via wireless connectivity with a computer attached to the chair.

The chair motion can be controlled in a constant setting that allows the chair user to move along an arc or in a control method for new users that only allows one motion at a time. According to the researchers, the Tongue Drive system can be used to create as many movement commands as the user can comfortably remember.



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Go Hornets!
By MrBlastman on 7/7/2009 11:08:29 AM , Rating: 2
It is nice to hear about a breakthrough or new technological idea being developed down south rather than MIT which we hear about all the time.

I think it is a neat idea but I wonder if they have thought about adding an enhanced tongue lubrication system as I would fear the tongue would be subject to drying out frequently as the user surfs the web or performs other actions. I suppose they would get used to retracting and salivating on the tongue but I can only imagine there might be a better way to enhance user comfort. Maybe a tongue misting system to allow a gentle dampening of the surfice while the subtle forces of evaporation work creating a nice symbiosis?




RE: Go Hornets!
By ChuckDriver on 7/7/2009 12:03:21 PM , Rating: 2
I'm sure they appreciate your praise, but the Institute's mascot is the Yellow Jacket, not the hornet.


RE: Go Hornets!
By MrBlastman on 7/7/2009 12:35:30 PM , Rating: 2
Today I'm with Stupid. derrr derrr derrrrrr

I sometimes get my high school mascot mixed up with Tech's. :-|


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