Amputee is First Out of the Gait with 'Power Knee'

by Mary Pilon USATODAY.com, 7 Aug 2006 Bill Dunham's leg has a brain -- at least an artificial one. Dunham, a retired U.S. Army Ranger and now a property manager in Arkansas, is the first amputee to be fitted with the Power Knee, a prosthetic device that uses motors, battery power and artificial intelligence to re-create a more natural stride. "I feel like my gait has improved dramatically," says Dunham, 37, who used to wear a regular prosthetic knee. "I feel like the leg is actually walking with me." Read more