AI Brain Implant Restores Movement and Touch to Paralyzed Man
Researchers have restored hand movement and the sense of touch to a man paralysed from the chest down using an AI brain implant called the "double neural bypass."
July 16, 2026 – 5:55 pm
Image by: Feinstein Institutes
What They Achieved
The participant, Keith Thomas, broke his neck in a 2020 diving accident, leaving him with complete tetraplegia and unable to lift his hands. Despite this, he enrolled in a three-year trial 13 months later.
After training, Thomas regained the ability to feed himself and drink from a cup with his own hand. Over 35 weeks, his right arm became 86% stronger and his left 62% stronger. He could also scratch his nose and wipe his mouth independently.
The Technology Involved
The system, developed by the Feinstein Institutes for Medical Research, combines:
- A brain-computer interface (BCI)
- AI
- Electrical stimulation of the spinal cord and brain
Long-Lasting Effects
Many of Thomas’s gains persisted even after the stimulation stopped, with some improvements still present over two years later. This suggests real rewiring of the nervous system, rather than a temporary fix.
“We’re not just bypassing the injury; we’re actually rewiring the nervous system,” said Chad Bouton, the study’s corresponding author.
How It Works
Surgeons implanted five microelectrode arrays in Thomas’s brain during a 15-hour operation. AI decodes his movement intentions and stimulates his forearm muscles to move his hand. Sensors in a 3D-printed brace then trigger stimulation of the sensory cortex, restoring the feeling of touch.
The decoder maintained up to 84.6% accuracy for five months without retraining. Thomas could lift empty eggshells without breaking them 87% of the time while holding a conversation.
The Broader Impact
This work contributes to a rapidly growing field of brain-computer interfaces. Competitors have used implants to restore speech, while others focus on wearable or non-invasive approaches. China has also recently cleared its first commercial brain implant.
About 15 million people worldwide live with spinal cord injuries, and for most with tetraplegia, hand function is a top priority. The team plans larger trials and is exploring the potential of this system to treat other conditions, including stroke.