| Home

Larger text Larger text Smaller text Smaller text | Order Photo Reprints

Man climbs Chicago skyscraper using bionic leg

Email Newsletters

Sign up for one of our email newsletters.

Daily Photo Galleries

By The Associated Press
Monday, Nov. 5, 2012, 7:18 a.m.

CHICAGO — The metal on Zac Vawter bionic leg gleamed as he climbed 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. Knowing leg amputees outnumber people who have lost arms and hands, the Chicago researchers are focusing more on lower limbs. If a bionic hand fails, a person drops a glass of water. If a bionic leg fails, a person falls down stairs.

This event was a research project for us, said Joanne Smith, the Rehabilitation Institute's CEO.

“We were testing the leg under extreme conditions. Very few patients who will use the leg in the future will be using it for this purpose. From that perspective, its performance was beyond measure,” Smith added.

To prepare for his pioneering climb, Vawter said, he practiced on a small escalator at a gym, while researchers spent months adjusting the technical aspects of the leg to ensure that it would respond to his thoughts.

When Vawter goes home to Yelm, Wash., where he lives with his wife and two children, the experimental leg will stay behind in Chicago. Researchers will continue to refine its steering. Taking it to the market is still years away.

“We've come a long way, but we have a long way to go,” said lead researcher Levi Hargrove of the institute's Center for Bionic Medicine. “We need to make rock solid devices, more than a research prototype.”

The $8 million project is funded by the U.S. Department of Defense and involves Vanderbilt University, the Massachusetts Institute of Technology, the University of Rhode Island and the University of New Brunswick.

“A lot of people say that losing a leg is like losing a loved one,” said Vawter. “You go through a grieving process. You establish a new normal in your life and move on. Today was a big event. It's just neat to be a part of the research and be a part of RIC.”

Nearly, 3,000 climbers participated in the annual charity event. Participants climbed about 2,100 steps to the Willis Tower's SkyDeck level to raise money for the institute's rehabilitation care and research.

Subscribe today! Click here for our subscription offers.



Show commenting policy

Most-Read Stories

  1. Web-savvy terrorists have success luring U.S. recruits with social media
  2. North Side toymaker Digital Dream Labs starts strong in 1st holiday season
  3. Pitt’s surge goes for naught as No. 11 Purdue prevails
  4. Pirates showing interest in starting pitcher Masterson
  5. Monessen Civic Center to host ‘Christmas Show’
  6. Mt. Pleasant Area School Board puts limit on taxes for 2016-17
  7. Stylish, inexpensive dress takes television newsrooms by storm
  8. Automakers feast on deals in November
  9. Pittsburgh City Council advances $1M study of buildings
  10. Believe in Connellsville contest begins
  11. Overseas data, financial shares lead stocks to strong December start