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Brain Implant Translates Silent Inner Speech into Words, But Critics Raise Fears of Mind Reading Without Consent
To prevent authorized mind reading, the researchers had to devise a "password".
That’s the question raised by a striking new study where researchers from Stanford University’s BrainGate2 project report they have, for the first time, decoded “inner speech” — the experience of talking to oneself internally, often described as a voice in your head — directly from human brain activity. Across four participants with ALS or brainstem stroke, tiny microelectrodes implanted directly in the brain’s motor cortex picked up distinct firing patterns when they pictured sentences like ‘I don’t know how long you’ve been here ‘. “That means the boundary between private and public thought may be blurrier than we assume,” warned ethicist Nita Farahany, author of The Battle For Your Brain, in an interview with NPR.
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