Ian Burkhart, now 24, was paralyzed in 2010 after diving into a wave in shallow water. The accident left him with some arm movement but no use of his hands.
Then, about two years ago, scientists in Ohio equipped Burkhart with a
system
"The first time moving my hand — that was really just like that flicker of hope," Burkhart told reporters during a media briefing Tuesday. The briefing was held to publicize a
study
After many months of practice, Burkhart can now perform tasks like pouring water from a bottle, grasping small objects, and swiping a credit card through a card reader. He can also control the movement of individual fingers.
It's all possible because of technology that intercepts and decodes electrical signals from the brain before they reach Burkhart's damaged spine.
"We're actually routing them around the spinal cord injury and then reinserting those signals into the muscles," says
Chad Bouton
The system relies on electrodes implanted in Burkhart's brain, a computer interface attached to his skull, and electrical stimulators wrapped around his forearm. It was developed by a team at Ohio State University and Battelle Memorial Institute, in Columbus, Ohio, where Bouton used to work.
At first, Burkhart could grasp objects, but he would drop them when he moved his arm. His skill has improved steadily, though, Bouton says.
"Ian is learning how to think about very detailed movements and the machine is actually learning how to decipher those signals more effectively as well," Bouton says. "So they're actually learning together."
Burkhart's achievements have received a great deal of media attention. But he is just one of many paralyzed people using technology that allows them to perform daily tasks using their thoughts.
And much of the technology Burkhart relies on is also in use at other research centers, says
Robert Kirsch
"The brain computer interfacing that they did is kind of garden variety," Kirsch says. "And the electrical stimulation that they've done is really old-fashioned."
Other groups have obtained better results using electrical stimulators that are implanted in muscles, instead of placed on the skin, Kirsch says. That approach requires extra surgery but allows more precise control of muscles, he says.
At a scientific meeting last year, a member of Kirsch's team
reported
More than a decade of experiments has shown that paralyzed people can learn to use their thoughts to control computers, robotic arms and even their own limbs, says
Leigh Hochberg
What people who are paralyzed really want, Hochberg says, is "a fully implanted technology, one that doesn't have wires or plugs that are sticking up above the scalp, doesn't have wires that are wrapped around the outside of the arm."
And that, he says, will require technological advances — including the ability to transmit signals from the brain without using wires.
"The process of getting from where we are today, which is some exciting early clinical research, all the way through to a clinically useful, vetted device that will help someone with paralysis is still a long one," Hochberg says.
Copyright 2016 NPR. To see more, visit
http://www.npr.org/