A concussion is a type of traumatic brain injury or TBI this is caused by a bump, blow, or jolt to the head or by a hit to the body that causes the head and brain to move rapidly back and forth. This sudden movement can cause the brain to bounce around or twist in the skull, creating chemical changes in the brain and sometimes stretching and damaging brain cells.
What Is a Concussion? (2017, January 31). Retrieved August 30, 2017, from https://www.cdc.gov/headsup/basics/concussion_whatis.html
It's a Concussion Discussion 