Mind-controlled prostheses offer hope for disabled
The first kick of the 2014 FIFA World Cup may be delivered in Sao Paulo next June by a Brazilian who is paralyzed from the waist down. If all goes according to plan, the teenager will walk onto the field, cock back a foot and swing at the soccer ball, using a mechanical exoskeleton controlled by the teen’s brain.
Motorized metal braces tested on monkeys will support and bend the kicker’s legs. The braces will be stabilized by gyroscopes and powered by a battery carried by the kicker in a backpack. German-made sensors will relay a feeling of pressure when each foot touches the ground. And months of training on a virtual-reality simulator will have prepared the teenager — selected from a pool of 10 candidates — to do all this using a device that translates thoughts into actions.
“We want to galvanize people’s imaginations,” says Miguel Nicolelis, the Brazilian neuroscientist at Duke University who is leading the Walk Again Project’s efforts to create the robotic suit. “With enough political will and investment, we could make wheelchairs obsolete.”
Mind-controlled leg armor may sound more like the movie “Iron Man” than modern medicine. But after decades of testing on rats and monkeys, neuroprosthetics are finally beginning to show promise for people. Devices plugged directly into the brain seem capable of restoring some self-reliance to stroke victims, car crash survivors, injured soldiers and others hampered by incapacitated or missing limbs.
