International consensus definitions of video signs of concussion in professional sports.
Davis GA, Makdissi M, Bloomfield P, Clifton P, Echemendia RJ, Falvey ÉC, Fuller GW, Green G, Harcourt P, Hill T, McGuirk N, Meeuwisse W, Orchard J, Raftery M, Sills AK, Solomon GS, Valadka A, McCrory P. Br J Sports Med. 2019 Apr 6. pii: bjsports-2019-100628. doi: 10.1136/bjsports-2019-100628. [Epub ahead of print]
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Representatives from seven sporting bodies (Australian Football League, Cricket Australia, Major League Baseball, NFL, NHL, National Rugby League, World Rugby) reached consensus on video signs considered most useful in identifying a possible concussion. The key signs were lying motionless, motor incoordination, impact seizure, tonic posturing, no protective action – floppy, and blank/vacant look. These signs are defined in the consensus statement.