Release date: 2006-08-07
A major leap in bionics has been achieved by researchers in the United States, marking a significant step toward restoring mobility to those who have lost limb function. According to recent reports from "The Times" and other media outlets, an American man with a cervical spinal injury has successfully controlled a robotic arm using a brain-computer interface. This groundbreaking technology allows him to perform daily tasks such as turning on the TV or reading emails simply by thinking about them. The development is seen as a crucial milestone in the evolution of bionic systems, offering hope for people with severe disabilities.
The system involves a small implant placed in the brain, which reads neural signals and translates them into commands that can be executed by a computer or robotic device. Matthew Nagel, a 25-year-old from Massachusetts, suffered a spinal injury in 2001 after being stabbed, leaving him paralyzed below the neck. In 2004, he underwent surgery at Rhode Island Hospital to implant a chip known as the “brain-machine-neural interaction system.†This tiny device, measuring just 4 mm on each side, contains 100 ultra-fine electrodes—thinner than a human hair—that are positioned on the motor cortex of the brain. These electrodes capture electrical signals from nearby neurons, transmitting them through wires to a titanium base on his scalp, which connects to a computer.
Through this system, Nagel was able to control a computer cursor, send emails, play simple games, and even operate a robotic arm. He could perform these actions while speaking, suggesting that the process does not require intense concentration. One notable achievement was when he learned to open and close a robotic hand without relying on visual feedback, simply by focusing on the movement. Later, he used a multi-joint robotic arm to grasp and move objects, demonstrating the potential of this technology to restore independence.
Professor John Donoghue, who led the research, expressed optimism about the future of this technology. “This shows great promise,†he said. “In the future, we may be able to use brain signals to stimulate muscles directly, restoring natural movement to those who have lost it.†For Nagel, the implant has dramatically changed his life. “It’s amazing,†he said. “After my injury, I felt frustrated for two years. Now, it's the third year, and this technology is incredible.â€
Although the technology is still in its early stages, scientists believe it has the potential to revolutionize the lives of people with paralysis. While challenges remain, the progress made over the past three decades has brought science fiction closer to reality. In the 1970s, the TV series "The Six Million Dollar Man" depicted a bionic hero, Steve Austin, whose mind-controlled prosthetics were once considered pure fantasy. Today, that vision is becoming a tangible reality.
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