A concussion is a type of traumatic brain injury caused by a bump, blow, or jolt to the head—or hit to the body—that causes the brain to move rapidly back and forth in the skull. Concussions can have ...

A Stanford class helped build CrashCourse, an education program that is now transforming concussion reporting culture on a national scale.

There's an injury on the field — a collision or maybe a fall — and now a student athlete doesn't feel right. The coach thinks the athlete looks confused and clumsy. The athlete reports concerning ...