Brain 'Microstimulation' Gives Back Sense of Touch After Spinal Cord Injury

Scientists have found a way to help people feel touch again after a spinal cord injury takes away that ability. A device called a brain-computer interface sends tiny electrical pulses into the brain, allowing patients to feel sensations in their hands. Researchers in Pittsburgh say five people have used this technology safely for up to ten years. The findings were published on July 15, 2026, in a science journal called Science Translational Medicine.

A spinal cord injury can cut off the signals that normally travel between the body and the brain. When that happens, a person may lose the ability to feel things like heat, pressure, or pain in parts of their body. This is a serious problem because touch helps us interact safely with the world around us. Scientists have been working for years to find a way to bring that sense back.

The brain-computer interface works by using tiny wires called electrodes that are placed inside the brain. A computer reads signals from the brain and figures out what the person is trying to do. In this case, the device sends electrical pulses to a part of the brain called the somatosensory cortex, which is in charge of processing touch, pain, and temperature. The pulses make the brain feel as if the hands are sensing something, even though the spinal cord is damaged.

Researchers at the University of Pittsburgh first started looking into this technology around 2015. By 2020, they had placed brain implants in their first patient. Over the years, five volunteers joined the study, and together they received a total of 168 million pulses of brain stimulation. That is a huge number, but the researchers say the process stayed safe the whole time.

One of the most important things the scientists checked was whether the technology kept working over a long period. Robert Gaunt, a professor at the University of Pittsburgh, said brain-computer interfaces need to work safely for years to truly help people. The good news is that the touch sensations the patients felt stayed focused on their hands and did not spread to other parts of the body. This shows the device is very precise, even after many years of use.

There was one downside the scientists noticed. Over time, some of the electrodes in the brain stopped working as well as they did at the start. On average, about 64 percent of the electrodes were still working properly after several years. That means roughly one out of three electrodes lost some of its ability to send signals. Still, researchers say this is a promising result and enough to keep the technology useful.

The touch sensation the patients feel goes away as soon as the device is switched off. That means the effect is temporary, which is something the team expected. Researchers are still working to make the sensations feel more natural and easier for users to control. Lead author Charles Greenspon, a professor at the University of Chicago, said this is proof that the technology can move out of the lab and into people's homes one day.

Looking ahead, scientists think this kind of brain-computer interface could do even more than restore touch. They believe it might one day help people who have lost other senses, like hearing or vision. For now, the team is focused on making the current technology work even better for spinal cord injury patients. Each small improvement brings researchers one step closer to helping more people live fuller, more independent lives.