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The NIRS/EEG brain-computer interface system is worn by a model in Switzerland in this undated photograph released in London, Britain, January 31, 2017. Laurent Bouvier/Wyss Centre/Handout via REUTERS
Scientists have developed a brain-computer interface that reads the brain's blood oxygen levels and enables communication by deciphering the thoughts of patients who are totally paralyzed and unable to talk.
In a trial of the system in four patients with complete locked-in syndrome - incapable of moving even their eyes to communicate - it helped them use their thought waves to respond yes or no to spoken questions.
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