This new edition reflects the explosion of knowledge in basic science and clinical care for athletes with mild traumatic brain injury or concussion. Interest in management and methodology for making diagnoses and improving the clinical outcomes have changed dramatically. All U.S. states have laws dictating how sports concussion patients are cared for and require return to play decisions be coordinated with best practice methods. Epidemiology, classification, and biology of sports concussion, as well as, brain imaging, assessment tests, neuropsychological measures, and management strategies are covered. Illustrative clinical cases, correlative examples, and historical insights are featured.