Seven years ago, Tim Hemmes broke his neck in a motorcycle accident. He was left paralyzed from the shoulders down. However, Hemmes recently managed to do something that he worried might never be possible: he rubbed his girlfriend hand.
An experimental procedure at the University of Pittsburgh successfully linked Hemmes’ brain to a robotic prosthetic. Through a project called BrainGate, tiny electrodes were implanted in his brain and linked to the bionic arm in a manner that bypassed his severed spinal cord. These electrodes are capable of reading the signals sent by Hemme’s neurons to control the movement of the arm, itself produced at Johns Hopkins University Applied Physics Laboratory with a grant provided by the Pentagon’s Defense Advanced Research Projects Agency (DARPA). Though this technology is a long way from being viable for general use, it represents a major step forward.
Huffington Post reports:
Hemmes likened moving the DARPA arm to learning to drive a car with a manual transmission. It took practice, but by week four he was moving the arm sideways as well as back and forth.
The fingers still clenched pretty tight, though. So when his girlfriend Katie Schaffer spoke up – “I want to hold your hand,” she said on his last day of testing – Hemmes didn’t dare bend them.
The two met after his accident, so he’d never before reached out to her.
“I was just trying to be gentle. I didn’t want to hurt her, and I finally got there,” Hemmes says. “Definitely the tears were flowing.”
Hemmes’ next goal: hugging his eight-year-old daughter.










