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

When Phil O’Keefe wants to open a document or click a link on his computer screen, he can think about tapping his left ankle.

That brain activity is collected by sensors implanted in a blood vessel in Mr. O’Keefe’s brain and relayed to a computer through devices in his chest. The signals are converted to a mouse click or zoom-in on his screen with the help of machine-learning software.


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