The University of Minnesota's Department of Biomedical Engineering, in collaboration with industry partners, has created a small, implanted device that links to a person's peripheral nerve in the arm. When combined with a robotic arm and an artificial intelligence computer, the device can detect and analyze brain signals, allowing upper limb amputees to move their arms just by thinking.
The study was published in the Publication of Neural Engineering, a peer-reviewed scientific journal dedicated to the multidisciplinary subject of neural engineering.
“It’s a lot more intuitive than any commercial system out there,” said Jules Anh Tuan Nguyen, a postdoctoral researcher and Ph.D. graduate in biomedical engineering from the University of Minnesota Twin Cities.
“With other commercial prosthetic systems, when amputees want to move a finger, they don’t actually think about moving a finger. They’re trying to activate the muscles in their arm, since that’s what the system reads. Because of that, these systems require a lot of learning and practice. For our technology, because we interpret the nerve signal directly, it knows the patient’s intention. If they want to move a finger, all they have to do is think about moving that finger.”
Nguyen has been working on this project for almost ten years alongside Associate Professor Zhi Yang of the University of Minnesota's Department of Biomedical Engineering, and was one of the major creators of the neural chip technology.
The research began in 2012, when Edward Keefer, a neuroscientist in the sector and the CEO of Nerves, Incorporated, approached Yang about developing a nerve implant for amputees. The couple got financing from the Defense Advanced Research Projects Agency (DARPA) of the United States government and have subsequently completed multiple successful clinical studies with genuine amputees.
To commercialize the technique, the researchers collaborated with the University of Minnesota Technology Commercialization office to develop Fasikl, a play on the term "fascicle," which refers to a bundle of nerve fibers.
“The fact that we can impact real people and one day improve the lives of human patients is really important,” Nguyen added. “It’s fun getting to develop new technologies, but if you’re just doing experiments in a lab, it doesn’t directly impact anyone. That’s why we want to be at the University of Minnesota, involving ourselves in clinical trials. For the past three or four years, I’ve had the privilege of working with several human patients. I can get really emotional when I can help them move their finger or help them do something that they didn’t think was possible before.”