“A technology currently used to monitor epilepsy is being adapted into a neural interface for people who are paralyzed or have motor impairments from neurodegenerative disease. Neurolutions, a startup based in St. Louis, is developing a small, implanted device that translates signals recorded from the surface of the brain into computer commands.

The device is based on electrocorticography (ECoG), in which a grid of electrodes is surgically placed directly on the surface of the brain to monitor electrical activity. This technology is currently used for surgical planning in patients with uncontrolled epilepsy in order to find the origin of their seizures.”  [source]