For those who want information on the actual NHL concussion protocol, here it is from Dr. Ruben Echemendia, the NHL's leading voice in the research, data collection and analysis of concussions..
"If at that time the player is determined to have had a concussion than that triggers the concussion protocol, which means the player must be kept out of play until they are symptom-free both at rest and on exertion," he said
Notably, the player is held out of practices, workouts and games. Additionally, "strenuous cognitive activity," such as video games, prolonged reading, working at a computer monitor -- activities that all "tax the brain and increase symptoms" -- are avoided.
Echemendia said the player will have to pass "a fairly extensive neuropsychological test battery conducted by the consulting neuropsychologist [who works closely with NHL/NHLPA Concussion Working group] for each team."
The data from those tests goes to the team physician, who ultimately makes the decision on when the player can return.
"Throughout that process we put the player through a gradual increasing intensity of physical exercise to see whether the physical provocation brings about any symptoms," Echemendia said, adding the physical exercise tests begin with trials on a stationary bike.