A concussion is a brain injury.  Concussions can be caused by a direct or indirect hit to the head or body that causes a shaking or jarring of the brain inside the skull. Concussions are called the invisible injury because you can’t see the injury on the outside and tests like MRI or CT scans usually appear normal. 1






1 Parachute Canada. (March 3, 2014). Concussion Questions and Answers. Retrieved from


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