Wheelchair arm controlled by thought alone
Saturday, February 28th, 2009
Brain
Eric Bland from Discovery first reported this recently. What a boon for people who use wheelchairs.
A wheelchair-mounted robotic arm controlled by thought alone has been created by scientists at the University of South Florida.
The device could give people with amytrophic lateral sclerosis (ALS) or full body paralysis the ability to perform simple day to day functions that would otherwise be impossible.
“We aren’t reading people’s thoughts,” said Redwan Alqasemi, a scientist at the University of South Florida who, along with Rajiv Dubey and Emanuel Donchin of USF, helped develop the software and hardware. “This is the first time a person with severe disabilities like ALS can perform daily activities for themselves.”
In this case, the scientists monitor a particular brain wave called P300, so-called because it lasts about one-third of a second. Reading P300 waves is basically like reading a person’s thoughts, but only in the most coarse kind of way.
Reading P300 brain waves is a good system, argues Walpaw, because it doesn’t take a lot of practice to train the brain. With only one WMRA built so far and no current plans to commercialize the design, not many people will get the chance for their brain to learn the new skill. But when commercial models appear in several years, even slow brain computer interfaces could make the impossible, possible.
“It would allow patients with severe disabilities the ability to control their own environment and have some form of independent mobility,” said William Heetderks, Director of the National Institute of Biomedical Imaging and Bioengineering. “It would be very valuable to these individuals.”














