Michael W. Kirkwood, PhD, ABPP-CN, is Associate Clinical Professor in the Department of Physical Medicine and Rehabilitation at the University of Colorado School of Medicine. He is also Director of the Psychology/Neuropsychology Program in the Department of Rehabilitation Medicine at Children’s Hospital Colorado, and founder and Codirector of the hospital’s Concussion Program. Dr. Kirkwood is board certified in Clinical Neuropsychology and board certified as a subspecialist in Pediatric Neuropsychology by the American Board of Professional Psychology, and has served on multiple boards of directors and expert committees. He has conducted extensive research on traumatic brain injury and pediatric validity testing in children and teens, has lectured widely, and has published more than 50 journal articles and 10 book chapters. He is coeditor of the book Mild Traumatic Brain Injury in Children and Adolescents.