Paired-Pulse Repetitive Trans-Spinal Magnetic Stimulation Supports Balance Ability While the Coil Orientation...

Area of Science:

• Neuroscience
• Rehabilitation Medicine
• Biomedical Engineering

Background:

• Balance control is crucial for daily activities and injury prevention.
• Non-invasive brain stimulation techniques are emerging as potential tools for neuromodulation and rehabilitation.
• Trans-spinal magnetic stimulation (TSMS) offers a method to modulate spinal cord activity.

Purpose of the Study:

• To investigate and compare the effects of three distinct paired-pulse repetitive trans-spinal magnetic stimulation (PP-rTSMS) protocols on balance control.
• To assess the impact of PP-rTSMS on corticospinal network function.
• To determine the influence of magnetic coil orientation on PP-rTSMS efficacy for balance.

Main Methods:

• Twenty-seven healthy young individuals participated in a randomized, sham-controlled study.
• PP-rTSMS was applied over the T8 vertebra using different coil handle orientations (cranial, caudal, lateral) and a sham condition.
• Balance ability was measured using the Y Balance Test, and corticospinal excitability was assessed via motor evoked potentials (MEPs) and cortical silent periods (SCPs).

Main Results:

• All three PP-rTSMS conditions significantly improved balance ability compared to the sham condition.
• The lateral coil orientation yielded significantly greater balance improvements than cranial and caudal orientations.
• No significant changes in corticospinal network functions (MEPs, SCPs) were observed across conditions.

Conclusions:

• PP-rTSMS is an effective non-invasive method for enhancing balance control in healthy individuals.
• The orientation of the magnetic coil is a critical factor influencing the effectiveness of PP-rTSMS for balance.
• Further research is warranted to explore PP-rTSMS in diverse populations and with varied parameters.