Potencial motor evocado pela estimulação magnética transcraniana: influência de diferentes protocolos de colocação de eletrodos de superfície

Abstract

Objective: To investigate the amplitudes of motor evoked potentials (MEPs) generated by means of Transcranial Magnetic Stimulation (TMS) from three different protocols for recording the surface electromyography signal (sEMG). Methodology: The biceps brachii muscle from both sides of eight (8) adult individuals were evaluated by means of sEMG for the purpose of acquiring MEPs from protocols that differ in terms of electrode placement, namely: Garcia et al. (2017); FINC (Rossi et al., 2009); Munneke et al. (2018). It composes protocols 1, 2 and 3 respectively, which differ from their location, and distance in the muscle by providing different detection volumes. MEPs were collected simultaneously in the three protocols. Results: The highest amplitudes were found from the registration of protocol 2 compared to the other two protocols evaluated. Conclusion: Protocol 2 provides MEP with lower coefficient of variation and greater amplitudes. Significance: The disposition of the electrodes must be considered during the evaluation with TMS, as they result in MEP with different amplitudes.