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Stanford scientists develop brain implant capable of 'decoding inner speech'
SCIENCE.ORG
'brain transparency'
SUMMARY
Stanford researchers advanced brain-computer interface (BCI) technology by decoding inner speech—internal monologue—with implants reading neural signals in four people with severe movement disorders.
Unlike past devices requiring strenuous attempts to vocalize, this system decoded silently imagined words, drawing from a 125,000-word vocabulary with real-time accuracy rates ranging from 46% to 74%.
The study confirmed that the motor cortex activates similarly during both attempted and inner speech, though inner speech produces weaker signals. By isolating those signals, researchers translated internal sentences into audio, enabling speech without movement.
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