Intraoperative monitoring (IOM) involves the use of neurophysiological recordings for detecting changes in the functions of the nervous system that are caused by surgically induced insults while the changes are still reversible. The field has expanded rapidly in the past 3 decades. In order to grasp the technique of IOM and improve the accuracy of IOM interpretation, it is crucial to understand the neuroanatomical and physiological bases for IOM. Now the third edition of the classic textbook Intraoperative Neurophysiologic Monitoring offers leading-edge, comprehensive coverage of this topic.