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Man climbs Chicago skyscraper using bionic leg



Published: Mon, November 5, 2012 @ 2:45 p.m.

CHICAGO (AP) — The metal on Zac Vawter's bionic leg gleamed as he climbed the 103 floors of Chicago's iconic Willis Tower, becoming the first person ever to complete the task wearing a mind-controlled prosthetic limb.

Vawter, who lost his right leg in a motorcycle accident, put the smart limb on public display for the first time during an annual stair-climbing charity event called "SkyRise Chicago" hosted by the Rehabilitation Institute of Chicago, where he is receiving treatment.

"Everything went great," said Vawter at the event's end. "The prosthetic leg did its part, and I did my part."

The leg is designed to respond to electrical impulses from muscles in his hamstring. When Vawter thought about climbing the stairs, the motors, belts and chains in his leg synchronized the movements of its ankle and knee.

The computerized prosthetic limb, like something from a sci-fi film, weighs about 10 pounds and holds two motors.

Bionic — or thought-controlled — prosthetic arms have been available for a few years, thanks to pioneering work done at the Rehabilitation Institute.


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