Matt V. and Tallon S.
a concussion is a traumatic brain injury
How To Avoid Snowboard Injuries | Avoid Snowboard Falls
Sport Science: NFL Concussions and helmet to hemet collisions
Concussions in Sports
concussion if minor should be out for sport for 2 to 4 weeks
A concussion could lead to death or never playing sports again
You can't prevent a concussion unless you listing to the coach or the directer.