A concussion is a type of traumatic brain injury, or TBI, caused by a bump, blow, or jolt to the head that can change the way your brain normally works. Concussions can also occur from a blow to the body that causes the head to move rapidly back and forth. Concussions can occur in any sport or recreation activity. A concussion can have long term impacts on young athletes such as their health, memory, learning and even their survival. All participants in youth sports - coaches, parents and athletes - should be aware of the signs and dangers a concussion can pose.