Rebuilding motor function of the spinal cord based on functional electrical stimulation

Area of Science:

• Neuroscience
• Biomedical Engineering
• Rehabilitation Medicine

Background:

• Restoring motor function after spinal cord injury (SCI) presents a significant clinical challenge.
• Functional electrical stimulation (FES) offers a potential method to reactivate neural pathways below SCI sites.

Purpose of the Study:

• To determine the precise locations of motor function sites in the lumbosacral spinal cord.
• To create a 3D map correlating motor sites with specific muscles.
• To validate the map's utility in guiding FES for motor function restoration.

Main Methods:

• Functional electrical stimulation (FES) was employed to identify motor function sites in the lumbosacral spinal cord.
• A three-dimensional map was constructed, detailing the relationship between identified motor sites and corresponding muscles.
• Individual experimental parameters and normalized coordinates were used to calculate sites controlling specific muscles.

Main Results:

• Phased pulse sequences were successfully delivered to the identified motor function sites.
• Targeted movements including hip extension, hip flexion, ankle plantarflexion, and ankle dorsiflexion were achieved.
• The created map of spinal cord motor function sites was validated as accurate and effective.

Conclusions:

• The study successfully mapped lumbosacral spinal cord motor function sites using FES.
• The developed 3D map provides a valuable tool for selecting optimal electrical stimulation sites.
• This approach holds promise for guiding the rebuilding of motor function following spinal cord injury.