The primary National Institutes of Health (NIH) organization for research on concussion is the National Institute of Neurological Disorders and Stroke. The NIH’s National Library of Medicine has compiled an encyclopedia-like website about concussions, which includes links to latest news, related topics and journal articles.
The Center for Disease Control and Prevention (CDC) has produced a variety of useful explainer videos for parents and coaches on its website, Brain Injury Basics. Titles include What is a Concussion?, Concussion Signs and Symptoms and Returning to School. Here is the CDC’s video entitled Animation of a Concussion: