Tiny Brain Implants Hold Big Promise for Immobilized Patients – The Wall Street Journal

When Phil OKeefe desires to open a file or click a link on his computer screen, he can think of tapping his left ankle.

Mr. …

That brain activity is collected by sensing units implanted in a capillary in Mr. OKeefes brain and relayed to a computer through devices in his chest. The signals are transformed to a mouse click or zoom-in on his screen with the assistance of machine-learning software.