The implant system uses flat electrodes positioned between the spinal nerves and vertebrae to send electrical signals to the spine to perform selected actions, such as taking steps or kicking. (Image credit: EPFL via Nature)
Scientists from the Swiss Federal Institute of Technology Lausanne (EPFL) have developed a system that allows those with spinal injuries to stand, walk and even perform recreational activities. A recently published study shows three patients with paraplegia regained the ability to walk via targeted neurotechnology that provides electrical stimulation to reactivate spinal neurons.
To get a better perspective on what the technology can provide, the scientists outfitted motorcyclist Michel Roccati with the system two years after he severed his spine in an accident. After extensive therapy and training with the embedded platform, he was able to walk, cycle and even climb stairs. Two other paralyzed individuals who tested the prototype system could also stand and move their legs hours after surgery. It only took a few days for them to walk with a walker, and after a few months of training and practice, they were able to regain some mobility in the real world.
The system uses flat electrodes implanted between the spinal nerves and vertebrae, which then send electrical impulses to the spine to perform particular tasks, such as taking steps, kicking and other leg movements. The initial prototype was produced in 2018 and has since been revised to an enhanced system with updated implants that are controlled by AI to activate the trunk and leg muscles.
The new technology has been combined with a personalized computational framework that allows for precision placement of the electrodes for each patient and a customized activity-dependent stimulation program. Users can then control their movements via a smartphone or tablet using the software to deliver specific signals for requested actions.
While this breakthrough is an incredible accomplishment in helping those with spinal injuries, it’s not a cure, meaning it won’t fully restore leg mobility or the sense of feeling. It’s also important to note that nine participants have regained some use of their legs, but most use the system for rehabilitation rather than getting around town. That said, even regaining partial movement without the aid of an exoskeleton is remarkable.
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