Two years later the company moved into a commercial garage, where Feldstein whipped up everything from bank deposit machines to human-nerve stimulators.
Mann controls a bunch of other startups, including companies that make prosthetic retinas for blind people and implantable nerve stimulators for stroke victims.
Parkinson's disease, for example, is being treated with deep brain stimulators, electrical devices in the brain that restimulate specific circuits of neurons that have become faulty.
Neurologists are also exploring the possibility of implanting stimulators (sold now by Medtronic for Parkinson's disease) deep in the brains of the minimally conscious to boost thalamus activity.