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via: CNET


Learning to speak – it’s one of the first lessons life teaches us. From our first word, our earlier years are spent honing and refining our language. However, in diseases like stroke or amyotrophic lateral sclerosis – also known as motor neurone disease – language is lost forever. 

Or at least it was. 

Now, the latest artificial intelligence in medical research and brain-computer interfaces are restoring communication to people unable to move or speak. 

Published in the prestigious journal Nature, the new technology is game-changing. For millions of sufferers around the world, this is a monumental step for artificial intelligence in global health

But how did the team do it?


Implanting the brain interface 

To convert the paralyzed man’s thoughts into words, the team began developing a brain implant. The patient, in his 60s, had previously lost all movement below his neck due to a spinal cord injury in 2007. 

Surprisingly, the brain actually retains the ability to perform fine movements up to a decade after the movement was first lost. Because while the brain maintains normal functioning, it is the connection to the muscles which is severed. 

That’s where the brain implant came in.

 Researchers implanted two brain-computer interface chips – the size of a baby aspirin – in the left side of the brain, near the motor cortex. The motor cortex is normally the part of the brain that controls movement. 

Next came the hard part.


Thoughts into words 

The man concentrated on writing the letters of the alphabet. In his mind, he was writing with an imaginary pen on an imaginary legal pad. 

The chip detected the signal from the motor neurons. These signals were then translated from imaginary hand movements using the latest artificial intelligence in medical research. The AI algorithms were the true breakthrough: decoding the complex neural noise into individual letters. 

In short: the man’s intended hand and finger movements became letters on a computer screen.

 It was a victory for AI in healthcare.

The man was able to write at a speed of 90 characters per minute, with an accuracy between 94.1 to 99% using the system. Equivalent to roughly 18 words per minute. 

Even more impressive, the typing speeds are comparable to the smartphone typing speeds of his able bodied peers – 115 characters per minute (23 words per minute). 


Going forwards 

This revolutionary new technology may herald further advances in artificial intelligence in global health. Millions of people worldwide struggle daily to communicate due to a physical disability. With the latest artificial intelligence in medical research, that’s all about to change. 

Once, it would have seemed like science fiction. No longer; it’s reality.


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Credit: CNET