Brain-Computer Interfaces and Paralysis: The Growing Evidence That Neural Bridging Technology Can Restore Movement

Multiple significant advances in brain-computer interface (BCI) technology have emerged in recent years, collectively building evidence that paralysed patients can regain functional movement when neural bridging systems connect the brain's intentions to the muscles that have been disconnected by spinal cord injury. These developments represent a scientific trajectory, not a single breakthrough, and understanding the full picture is essential for clinical research professionals tracking this rapidly evolving field.

One of the most widely cited cases involved a 40-year-old Dutch man, Gert-Jan Oskam, who had been paralysed following a cycling accident 12 years earlier. In a Nature study, researchers at EPFL in Switzerland described how implants placed in his brain and spinal cord communicated wirelessly, allowing Oskam to walk naturally, climb stairs, and move across complex terrain. When Oskam thought about walking, the brain implant sent signals wirelessly to a computer worn as a backpack, which processed and translated those signals to a spinal implant that activated the appropriate muscle groups. An unexpected finding was that with extended use of the system, nerve fibre growth was stimulated at the injury site, suggesting that the bridge not only restores function but may promote biological repair.

A separate landmark study from Northwell Health's Feinstein Institutes for Medical Research in New York described the first use of a double neural bypass, in which five microchips were implanted across the brain regions controlling motor function and sensory input for the hand in a man paralysed below the chest after a diving accident. AI algorithms were used to read, interpret, and translate his intentions into action, restoring both movement and sensation in his hand and producing lasting gains in arm and wrist function outside of the laboratory.

In June 2025, a paralysed US military veteran became the fifth participant in Neuralink's PRIME Study at the University of Miami, which is evaluating the safety and functionality of Neuralink's intracortical BCI implant. The veteran, who sustained a spinal cord injury in a motorcycle accident, described the technology as restoring his sense of purpose and drive. PRIME is an investigational device study that continues to enrol participants with cervical spinal cord injury or ALS.

Taken together, these advances describe a field that has moved from proof-of-concept to a phase of expanding clinical testing. The common thread across all systems is the use of AI-driven signal interpretation to bridge the gap between a brain that still generates motor intention signals and muscles that can no longer receive them through the natural spinal pathway. Current limitations include the hardware complexity of wearing external components, the need for training sessions to optimise signal interpretation, and questions about long-term implant stability in human subjects over years rather than months.

For the clinical trials community, BCI trials are among the most complex device studies being conducted, involving neurosurgical implantation, AI algorithm development, bespoke rehabilitation protocols, and regulatory frameworks that vary significantly by jurisdiction. The field has reached a point where the evidence that neural bridging works in principle, in human subjects with real spinal cord injuries, has now been replicated across independent research groups, institutions, and countries. The question has shifted from whether neural bridging can restore function to how quickly the technology can be miniaturised, made accessible, and integrated into clinical practice at scale.

Sources: Nature (Courtine et al., May 2023) | Feinstein Institutes for Medical Research | CNN September 2023 | InventUM/University of Miami June 2025 | Neuralink PRIME Study (NCT06429735)