The patient’s mind was put into sentences on the screen.


AA | Thursday, July 15, 2021 – 17:09 | Last Updated : 15 07 2021 – 17:09

US scientists put what they wanted to say into sentences on the computer screen by examining the brain waves with electrodes placed in the brain of a patient who could not speak due to a stroke.

Researchers at the University of California, USA, studied a male patient in his late 30s who had been paralyzed by the condition more than 15 years ago.

The researchers placed electrodes on the surface of this person’s brain, which controls speech, with limited mobility of the head, neck, arms and legs, but unable to speak.

In the study, the subject first tried to say common words like “water” or “good,” while the electrodes recorded the brain signals.

In the study, in which the subject tried to say the specified 50 words repeatedly, the algorithm was finally able to distinguish 50 words from which more than 1000 words could be formed.

The algorithm asks the subject “How are you?” or “Are you thirsty?” “I’m very good.” or “No, I’m not thirsty.” He deciphered the answers he tried to give, from his brain activity, and sent these expressions word by word to the computer screen.

These responses appeared on the screen 3 or 4 seconds after the subject tried to speak.

Thus, in the study, the words of paralyzed people who could not speak were deciphered on the computer screen by using computer algorithm brain waves.

The results of the study were published in the “New England Journal of Medicine”.