Thematic ArticlesEvidence-Based Review of Sport-Related Concussion: Clinical ScienceJohnston, Karen M. MD, PhD*; McCrory, Paul MBBS, PhD, MSc†; Mohtadi, Nicholas G. MD‡; Meeuwisse, Willem MD, PhD‡Author Information *Department of Neurosurgery, McGill University, Montreal, Quebec, Canada; †Centre for Sports Medicine Research & Education, and Brain Research Institute, University of Melbourne, Melbourne, Victoria, Australia; and ‡University of Calgary, Sport Medicine Centre, Calgary, Alberta, Canada Address correspondence to Paul McCrory, mbbs, PhD , 31 Grosvenor Parade, Balwyn, Victoria 3101, Australia. E-mail: [email protected] compuserve.com Clinical Journal of Sport Medicine: July 2001 - Volume 11 - Issue 3 - p 150-159 Buy Abstract The clinical nature of sport-related concussion is discussed in this paper. Particularly highlighted are the difficulties with definition, injury severity grading, classification, and understanding of clinical symptoms. In addition, the well-recognized sequelae of concussion including the motor and convulsive manifestations are discussed in detail. Where possible, an evidence-based approach is adopted to assist the understanding of the literature in this complex area. © 2001 Lippincott Williams & Wilkins, Inc.