"Concussions can have cumulative and lasting effects on memory, judgment, social conduct, reflexes, speech, balance and co-ordination. Key to preventing repeated injuries is to recognize the symptoms of concussion when they occur and knowing how to deal with their effects."
"When Chicago Blackhawk's leading scorer Martin Havlat returned to the ice for game four of the Western Conference Final after sustaining a concussion only two days earlier, questions were raised surrounding his swift return."
And that was at the top. What about kids who have bells rung in the minor leagues?
"Serious misconceptions exist among minor league hockey players, athletes, coaches and parents when it comes to understanding the signs and symptoms of a concussion and its treatment”