What is suggested by the presence of sEMG trains?

The presence of surface electromyography (sEMG) trains indicates sustained electrical activity from muscle fibers, which can be a sign of ongoing muscle contraction. This sustained activity can occur due to various factors, including nerve traction or compression. When nerves are under tension or experiencing pressure, this can lead to increased muscle activation as a protective neural response, resulting in the detection of sEMG trains.

In the context of intraoperative monitoring, recognizing sEMG trains can serve as a critical indicator for the surgical team. If they are observed, it may be necessary to investigate the cause further, as it could affect surgical outcomes or indicate potential nerve injury.

Thus, the presence of sEMG trains is most closely linked with sustained nerve traction or compression, highlighting its significance in monitoring and protecting neuromuscular function during procedures.