Brain-Spine Implant Helps Paralyzed Patients Move Their Legs Within a Day

A spinal cord injury severs the lines of communication between the brain and the legs, and for most people the loss of movement has been permanent. A team at Fudan University in Shanghai is challenging that grim assumption. In a clinical trial that began with surgery on 8 January 2025 and added three more patients over the following weeks, researchers restored leg movement to four paralyzed patients using a brain-spine interface.

The system works by rebuilding the broken circuit. Two tiny electrode chips, each about a millimeter across, are implanted in the brain's motor cortex, where they read the neural signals that represent the intention to move. Those signals are decoded and relayed past the site of injury to stimulate the spinal nerve roots below, so that simply thinking about moving triggers the muscles to respond — a direct bridge from brain to limb.

“A team at Fudan University in Shanghai is challenging that grim assumption.”

The speed of recovery surprised even the researchers. Within 24 hours of surgery, patients could move their legs again. By day 14, the first patient walked more than 16 feet with the help of a standing frame, and within a few weeks patients were walking independently. Some also reported the return of sensation. "My feet feel warm and sweaty, and there is a tingling sensation. When I stand, I feel the muscles in my legs contracting," one patient said. The Chinese team reported reaching results in two weeks that earlier Swiss research had taken roughly six months to achieve, using entirely domestically developed devices.

These results, while genuinely exciting, come from a very small early trial, and important questions remain about how durable the benefits are, how the approach performs in larger and more varied groups of patients, and the risks that come with implanting devices in the brain and spine. Restoring natural, untethered walking outside a clinical setting is still a long road. But for people who were told they would never move their legs again, watching a thought translate into a step — within a day of surgery — is a profound glimpse of what neurotechnology may one day make routine.