The patients’ injuries to a region called the thoracic spine – below the neck and above the lowest part of the back – were sustained one to nine years before receiving the treatment. They were able to take their first steps within an hour after neurosurgeons first implanted prototypes of a nerve-stimulation device remotely controlled by artificial-intelligence software.

Over the next six months, the patients regained the ability to engage in the more advanced activities – walking, cycling and swimming in community settings outside of the clinic – by controlling the nerve-stimulation devices themselves using a touchscreen tablet, the researchers said.

The patients – men ages 29, 32, and 41 – all were injured in motor bike accidents.

Grégoire Courtine and Jocelyne Bloch of the Swiss Federal Institute of Technology in Lausanne led the study published in the journal Nature Medicine, opens new tab. They helped establish a Netherlands-based technology company called Onward Medical that is working to commercialize the system.

The company expects to launch a trial in about a year involving 70 to 100 patients, primarily in the United States, Courtine said.

There is no existing treatment to enable the spinal cord to heal itself, but researchers have pursued ways to help paralyzed people regain mobility through technology.

If this study’s early results are confirmed in larger studies, people immobilized by spinal cord injuries may someday be able to open a smartphone or talk to a smartwatch, select an activity such as “walk” or “sit,” then send a message to an implanted device that will stimulate their nerves and muscles to make the appropriate movements happen, the researchers said.

Normally to initiate movement the brain sends a message to the spinal cord, telling it to stimulate a pool of nerve cells that in turn activate the necessary muscles, Bloch said.

“It’s something we don’t even think about,” Bloch said. “It comes automatically.”

After complete spinal cord injury, messages from the brain cannot reach the nerves. Other researchers have tried to help paralyzed patients walk by stimulating nerves through the back of the spine, using broad electrical fields emitted by implanted devices originally designed to control chronic pain, Courtine said.

Courtine and Bloch and their team redesigned the devices so that electrical signals would enter the spine from the sides instead of from the back. This approach allows very specific targeting and activation of spinal cord regions, Courtine said.

The patients’ injuries to a region called the thoracic spine – below the neck and above the lowest part of the back – were sustained one to nine years before receiving the treatment. They were able to take their first steps within an hour after neurosurgeons first implanted prototypes of a nerve-stimulation device remotely controlled by artificial-intelligence software.

Over the next six months, the patients regained the ability to engage in the more advanced activities – walking, cycling and swimming in community settings outside of the clinic – by controlling the nerve-stimulation devices themselves using a touchscreen tablet, the researchers said.

The patients – men ages 29, 32, and 41 – all were injured in motor bike accidents.

Grégoire Courtine and Jocelyne Bloch of the Swiss Federal Institute of Technology in Lausanne led the study published in the journal Nature Medicine, opens new tab. They helped establish a Netherlands-based technology company called Onward Medical that is working to commercialize the system.

The company expects to launch a trial in about a year involving 70 to 100 patients, primarily in the United States, Courtine said.

There is no existing treatment to enable the spinal cord to heal itself, but researchers have pursued ways to help paralyzed people regain mobility through technology.

If this study’s early results are confirmed in larger studies, people immobilized by spinal cord injuries may someday be able to open a smartphone or talk to a smartwatch, select an activity such as “walk” or “sit,” then send a message to an implanted device that will stimulate their nerves and muscles to make the appropriate movements happen, the researchers said.

Normally to initiate movement the brain sends a message to the spinal cord, telling it to stimulate a pool of nerve cells that in turn activate the necessary muscles, Bloch said.

“It’s something we don’t even think about,” Bloch said. “It comes automatically.”

After complete spinal cord injury, messages from the brain cannot reach the nerves. Other researchers have tried to help paralyzed patients walk by stimulating nerves through the back of the spine, using broad electrical fields emitted by implanted devices originally designed to control chronic pain, Courtine said.

Courtine and Bloch and their team redesigned the devices so that electrical signals would enter the spine from the sides instead of from the back. This approach allows very specific targeting and activation of spinal cord regions, Courtine said.