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lüll Concussion Mullally WJAm J Med 2017[Aug]; 130 (8): 885-892Concussion has been recognized as a clinical entity for more than 1000 years. Throughout the 20th century it was studied extensively in boxers, but it did not pique the interest of the general population because it is the accepted goal of the boxer to inflict such an injury on their opponent. In 2002, however, the possibility that repetitive concussions could result in chronic brain damage and a progressive neurologic disorder was raised by a postmortem evaluation of a retired player in the most popular sports institution in the United States, the National Football League. Since that time concussion has been a frequent topic of conversation in homes, schools, and on television and has become a major focus of sports programs in communities and schools at all levels. Now all 50 states, the District of Columbia, and the National Collegiate Athletic Association have enacted laws and rules to protect the athlete.|Athletic Injuries/*complications/etiology[MESH]|Brain Concussion/*complications/diagnosis/etiology/physiopathology[MESH]|Brain Damage, Chronic/diagnosis/*etiology[MESH]|Humans[MESH] |