An insight into intraoperative neuromonitoring during resection of brain tumor using motor evoked potentials

This study aimed to evaluate the short and long-term prognostic value of intraoperative motor evoked potentials (MEP) in patients with brain tumor (n=121) having surgical resection in peri-eloquent regions.
Motor function scores at the postoperative period for transcranial MEP (TC-MEP; 17.5%, 100%, 100%, 69.4%) and direct cortical MEP (DC-MEP; 25.0%, 100%, 100%, 68.8%) were reported for the sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), respectively. Over the 1-year follow-up period, only 51.2% of patients had improved from their postoperative status.
Successful MEP monitoring in patients with brain tumor resection that experience postoperative transient deficits will likely have long-term improvement over time, given no disease progression.