If you injure your elbow, surgery can help. If you lose a leg, prostheses are available. But problems within the brain are more difficult to treat, and for stroke victims rehabilitation is largely left to the body’s own repair mechanisms. BrainQ aims to change that with a device that stimulates the damaged part of the brain and promotes self-repair, showing enough improvement in studies to warrant a Breakthrough Device certification from the FDA — and the company has just raised $40M to take it to market.
It should be said at the outset that doubting the efficacy of some brainwave-emitting miracle device is natural. And in fact when I