In an important step toward the goal of hooking our brains up to machines, scientists have developed a brain-computer interface (BCI) system that interprets neural signals without coming into contact with the brain itself.
Typically, neural implants need to rest on top or inside the brain, which can harm and kill brain tissue in ways that scientists still dont yet fully understand. But a company called Synchron is taking a different approach: developing BCI systems that slither toward the brain through the jugular vein, circumventing the need for brain surgery altogether.
Now, Wired reports that the company has taken it a step further: Its newest BCI doesnt even need to extend all the way to the brain in order to pick up on what its saying.
The implant, which remains in the bodys vasculature near the brain, was able to pick up and interpret neural signals that heralded the intent to move a muscle. Two patients paralyzed from Lou Gehrigs disease who were implanted with the experimental device were able to use it to communicate and send text messages, according to research published in the Journal of NeuroInterventional Surgery on Wednesday.
Self-expanding stent technology has been well demonstrated in both cardiac and neurological applications to treat other disease, neuroscientist and Synchron CEO Thomas Oxley told Wired. We just use that feature and put electrodes on top of the stent.
Its fully implantable, he added. Patients go home in a couple of days. And its plug-and-play.
Of course, its not quite that simple for the patients, who still need to spend weeks training the systems AI software to understand their neural signals once they get home. But once the system caught on to which brain impulses meant what, they were able to move a computer cursor around with an eye tracker and click their mouse just by thinking about it.
Theres a trade-off between how invasive you want to be and at what level you collect information, Andrew Pruszynski, a neuroscientist at Canadas Western University told Wired. This is trying to get to the middle ground, to insert a catheter close to the neural activity. Its obviously invasive, but certainly not as invasive as putting electrodes into the brain.
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New Brain-Computer Interface Doesn't Even Need to Touch the Brain - Futurism
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