The battery-powered prosthetic is controlled by signals from the brain. It looks like the one Luke Skywalker received after losing his right hand in a light-saber duel with Darth Vader. Unlike most prostheses, this one can perform tasks like zipping a coat and unlocking a door with a key.
Copyright 2015 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.