One of the hot ideas in medicine is a brain-machine interface. That is, a sensor placed in the brain would translate a person's thoughts into actions, such as movement of a robotic arm.
It sounds like science fiction, but the National Science Foundation started funding research on the concept at UCLA in the 1970s. More recently DARPA has been involved, and several companies are trying to commercialize the idea.
A look at one of those companies, BrainGate, shows how the technology works and how medical plastics might be involved.
BrainGate (Ponte Verdra Beach, FL) is a privately held company that bought intellectual property and related technology from Cyberkinetics, which had worked with researchers in the Department of Neuroscience at Brown University (Providence, RI)....