DAYTON, Tennessee (AP) -- Jesse Sullivan has two prosthetic arms, but he can climb a ladder at his house and roll on a fresh coat of paint. He's also good with a weed-whacker, bending his elbow and rotating his forearm to guide the machine.
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The motions are coordinated and smooth because his left arm is a bionic device controlled by his brain. He thinks, "Close hand," and electrical signals sent through surgically re-routed nerves make it happen.
Doctors describe Sullivan as the first amputee with a thought-controlled artificial arm.
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Although work that created Sullivan's arm preceded the research by DARPA, he said he's proud to test a type of bionic arm that soldiers could someday use. "Those guys are heroes in my book," he said, "and they should have the best there is."
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Sullivan's bionic arm represents an advance over typical artificial arms, like the right-arm prosthesis he uses, which has a hook and operates with sequential motions. There is no perceivable delay in the motions of Sullivan's flesh-colored, plastic-like left arm. Until now, it has been nearly impossible to recreate the subtle and complex motion of a human arm.
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more (including video):
http://www.cnn.com/2006/TECH/09/14/bionic.arm.ap/index.html