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Concussions largely ignored during 2014 World Cup

Associated Press

Nearly two-thirds of players who were involved in head collisions during the 2014 World Cup weren't adequately monitored by qualified health professionals to determine if they should have continued playing, according to an extensive video study published today in the Journal of the American Medical Association.

Why it matters: Concussions — from colliding with another player or repeatedly heading the ball — may structurally change the brain and have long-term effects on brain health and cognition.