A concussion is any injury to the brain that disrupts normal
brain function on a temporary or permanent basis. Concussions
are typically caused by a blow or jolt to the head. The
following is information from the American Academy of Pediatrics
about concussions, including guidance on treatment and
prevention. When do concussions occur? Concussions can happen in
any sport but more often occur in collision sports, such as
football, rugby, or ice hockey. They also are common in contact
sports that don’t require helmets, such as soccer, basketball,
wrestling, and lacrosse. However, a concussion can also occur
from a collision with the ground; a wall; a goalpost; or a ball
that has been thrown, hit, or kicked. Many concussions also
occur outside organized sports. For example, a child riding a
bike or skateboard can fall down and bump his head on the street
or an obstacle. The symptoms of a concussion range from subtle
to obvious and usually happen right after the injury but may
take hours to days to show up. Athle