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brain computer interface

Doctors perform brain implant for the first time in history

Doctors from Netherlands have performed the first-ever brain implant on a 58-year-old woman paralyzed by Lou Gehrig’s disease (also known as amyotrophic lateral sclerosis-ALS). The disease-caused nerve degeneration had left her with control only over her eyes. With this, she became the first patient to use a brain-computer interface. The implant has enabled paralyzed women to communicate in day-to-day life via a speech computer.

Prior to this implant, the ALS disease had caused nerve degeneration in the women and she was left completely locked-in. Her motor neurons had deteriorated to the point where she could only control her eye muscles.

Implant enabled her to control computer using brain signals, spelling out messages at two letters per minute.

brain_implant_brainpedia

The patient, whose treatment is detailed in a new paper in the New England Journal of Medicine, had a device called an electrocorticograph (ECoG) installed directly on her brain. In this case, the ECoG’s electrodes pick up impulses normally associated with moving her right hand and then amplify and transmit those signals using a small device implanted in her chest. A wireless receiver outside her body then converts the signals into data that can be used to control a table computer in front of her. In order to get the whole system working, the patient had to train her brain by playing Pong and whack-a-mole on the tablet, until she eventually could perform a “brain click” just by thinking about moving her right hand.

ALSO READ :   Brain-computer interface technology demonstrated at NMU

While the system is still slow. Ars Technica reports it takes her about 20 seconds to click a letter from an on-screen keyboard. The system is constantly being improved to add more useful functions like adjusting her thermostat or turning on the TV. And, for now, the amount of independence this patient now has is a major breakthrough in itself.

“I’m more confident and independent now outside,” the woman told New Scientist in an interview. “My dream is to be able to drive my wheelchair.”

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