This is a fundamental resource for physicians, technologists, and other health professionals who need to acquire state-of-the-art skills in neurophysiologic intraoperative monitoring (NIOM). It covers basic aspects of monitoring, describes the clinical and technical requirements for monitoring specific types of surgeries, and addresses the administrative aspects of running an NIOM service. This second edition has been updated to incorporate the vast amount of new information and techniques that have evolved since the publication of the first edition. This includes new chapters on each of the modalities used in monitoring (SEP, MEP, BAEP, EEG, and EMG), training curriculum for neurophysiologists and technologists, policies and procedures for NIOM labs, and accreditation and certification. Updated information on new applications of clinical methods includes new chapters on Dorsal Root Entry Zone Procedures and Movement Disorders Surgery.