Lakomkin N, et al. - The authors conducted this trial to evaluate the usefulness of somatosensory-evoked potentials (SSEP) and transcranial electric motor-evoked potentials (MEP) in the resection of tumors of the spine. The ability to predict postoperative neurological deficits by both single and multi-modal monitoring was also assessed. Data revealed that the efficacy of intraoperative monitoring (IOM) in spine tumor resection was dependent on tumor location relative to the spinal cord and dura. In addition, the accuracy of SSEPs and their ability to predict postoperative deficits were found to be greatest for intramedullary lesions. A benefit could not be gained in the speculation of permanent neurological deficits via MEP and multi-modal monitoring.