Walking naturally after spinal cord injury using a brain-spine interface

Area of Science:

• Neuroscience
• Biomedical Engineering
• Rehabilitation Medicine

Background:

• Spinal cord injury severs brain-spinal cord communication, causing paralysis.
• Restoring voluntary movement after chronic paralysis remains a significant challenge.

Purpose of the Study:

• To develop and test a brain-spine interface (BSI) for restoring natural walking.
• To evaluate the BSI's reliability and impact on neurological recovery.

Main Methods:

• A fully implanted BSI was created, linking cortical signals to epidural electrical stimulation.
• The system modulated spinal cord activity to enable leg movement.
• The BSI was calibrated quickly and tested for long-term reliability over one year.

Main Results:

• The BSI enabled an individual with chronic tetraplegia to stand and walk naturally in various settings.
• The interface allowed for controlled movements including climbing stairs and traversing uneven terrain.
• Neurorehabilitation with the BSI led to regained overground walking ability without the device.

Conclusions:

• A reliable BSI can restore natural motor control after spinal cord injury.
• This brain-spine interface offers a framework for future neuroprosthetic development.
• The technology facilitates both functional recovery and improved quality of life.