A man paralyzed from the chest down following a swimming accident regained the ability to feed himself and move his limbs through the use of an experimental brain implant. Keith Thomas, from Massapequa, New York, who had been unable to lift his arms from his wheelchair, participated in a trial beginning in 2021 that involved surgically implanted electrodes in his brain.

The procedure was conducted by researchers at the Feinstein Institutes for Medical Research. The implant functions as a brain-computer interface, bypassing the spinal cord injury responsible for Thomas’s paralysis. Over the course of several months of training following the surgery, Thomas gradually regained control over his arms and hands.

In addition to enabling voluntary movement, the interface also transmits sensory feedback to Thomas’s brain, allowing him to experience tactile sensations. This bidirectional communication is key to restoring not only motor function but also the sense of touch, which had been lost due to the injury.

The breakthrough highlights the potential of brain-computer interfaces to improve the quality of life for individuals with severe spinal cord injuries by recreating motor control and sensory perception previously lost. Researchers continue to refine the technology with the goal of expanding its applications to other patients with paralysis or neurological impairments.