Sept. 14, 2006 — 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. He's even mastered a more sensitive maneuver — hugging his grandchildren.
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.
At times he been so rough with the bionic arm that it has broken, including once when he pulled the end off starting a lawnmower.
That prompted researchers to make improvements, part of a U.S. government initiative to refine artificial limbs that connect body and mind. The National Institutes of Health has supported the research, joined more recently by the military's research-and-development wing, the Defense Advanced Research Projects Agency.
Some 411 U.S. troops in Iraq and 37 in Afghanistan have had wounds that cost them at least one limb, the Army Medical Command says.
"We're excited about collaborating with the military," said the developer of Sullivan's arm, Dr. Todd Kuiken, director of neuroengineering at the Center for Artificial Limbs at the Rehabilitation Institute of Chicago, one of 35 partners now in a DARPA project to develop a state-of-the-art arm.
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.
"It is not as smooth as a normal arm but it works much smoother than a normal prosthesis," Kuiken said.
Sullivan lost his arms in May 2001 working as a utility lineman. He suffered electrical burns so severe that doctors had to amputate both his arms at the shoulder.
