Charles D. Yingling, PhD, is one of the world’s leading authorities in the field of intraoperative neurophysiological monitoring. He was the founding Director of the Neural Monitoring Service at the University of California, San Francisco, where he was Professor of Neurological Surgery from 1984 - 2002. He is now Chief Scientific Officer for Surgical Neuromonitoring Services in San Francisco, and a Clinical Professor at Stanford School of Medicine. Dr. Yingling has personally monitored several thousand surgical cases, and has published numerous journal articles and book chapters in the field. A Past President of the American Society of Neurophysiological Monitoring (ASNM), he was one of six people in the United States chosen for the Founding Board of the American Board of Neurophysiologic Monitoring (ABNM), which since 1999 has administered the written and oral examinations for the DABNM, the highest level Board certification specifically evaluating competency in intraoperative monitoring. Dr. Yingling’s contributions to the field were recognized by the ASNM in 2002 when he was the second recipient of the President’s Lifetime Achievement Award, and is also acknowledged by inclusion in Who’s Who in Medicine and Healthcare. He is well known as an engaging and accessible mentor and lecturer, and has given invited addresses on monitoring techniques at numerous conferences in the US, Europe, and Asia. Since 2002, he has conducted training programs in different monitoring techniques at many institutions throughout the US, including major academic medical centers, private hospitals, and private monitoring practices.