ArticleIntraoperative NeuromonitoringMinahan, Robert E. MDAuthor Information From the Department of Neurology, Johns Hopkins University, Baltimore, Maryland, USA. Send reprint requests to Robert E. Minahan, MD, Department of Neurology, Johns Hopkins University, Pathology 2-210, 600 North Wolfe Street, Baltimore, MD 21287. E-mail: [email protected] The Neurologist: July 2002 - Volume 8 - Issue 4 - p 209-226 Buy Abstract BACKGROUND– Intraoperative neuromonitoring (IONM) has been a valuable part of surgical procedures for over 25 years. Insight into the nervous system during surgery provides critical information to the surgeon allowing reversal or avoidance of neural insults. REVIEW SUMMARY– Electrophysiological tests including electroencephalography, electromyography, and multiple types of evoked potentials (somatosensory, auditory, and motor) are monitored during surgeries that involve risk to the nervous system. Deterioration of signals suggests a surgical insult and is associated with an increased risk of postoperative deficit. Intraoperative identification of this risk allows corrective action. In addition, IONM teams make use of their armamentarium of tests to evaluate anatomy or function of the nervous system in response to specific questions posed by the surgical team. CONCLUSIONS– Intraoperative recordings are now a routine part of many surgical procedures. Their correct application leads to improved surgical outcome. © 2002 Lippincott Williams & Wilkins, Inc.