concussion test for sport

http://www.nytimes.com/2015/12/14/sports/rugby/tragedy-forges-alliance-for-change-in-concussion-protocol.html?smid=fb-nytimes&smtyp=cur&_r=1

 

players are timed saying a string of numbers. then after a hit during the game, they are timed saying the same string again. if they are slower than normal, they get further evaluation. king-devick test

 

https://en.wikipedia.org/wiki/King–Devick_Test

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