Transcutaneous electrical spinal-cord stimulation in humans.

Area of Science:

• Neuroscience
• Biomedical Engineering
• Rehabilitation Science

Background:

• Locomotor behavior is governed by spinal cord central pattern generators, exhibiting automaticity.
• These circuits can be modulated by spinal cord stimulation and pharmacological interventions.
• Current neuromodulation strategies aim to restore motor control in spinal cord injury (SCI) patients.

Purpose of the Study:

• To introduce a novel non-invasive stimulation strategy: painless transcutaneous electrical enabling motor control (pcEmc).
• To assess pcEmc's ability to modulate spinal cord activity and facilitate locomotor behavior.
• To evaluate the efficacy of pcEmc, particularly with multielectrode arrays and exoskeleton technology, for SCI rehabilitation.

Main Methods:

• Development and application of a painless transcutaneous electrical enabling motor control (pcEmc) technique.
• Testing pcEmc's effect on stepping performance in a gravity-neutral position using single-site and multi-site stimulation.
• Utilizing multielectrode surface array technology for fine-tuning locomotor control.
• Combining pcEmc with exoskeleton technology for SCI patient rehabilitation.

Main Results:

• pcEmc successfully facilitated stepping performance in non-injured subjects.
• Multi-site spinal cord stimulation proved more effective than single-site stimulation for inducing stepping.
• Preliminary data suggest multielectrode arrays can precisely control locomotor behavior.
• The pcEmc strategy combined with exoskeletons improved motor function in paralyzed SCI patients.

Conclusions:

• pcEmc is a novel, non-invasive neuromodulation strategy for the spinal cord.
• This technique effectively facilitates locomotor behavior and has potential for SCI rehabilitation.
• Further research into pcEmc holds significant implications for understanding locomotion and restoring sensorimotor function after severe SCI.