1. He just delivered the elbow to the head of Willis, which caused the concussion, which caused him to miss two games. 2. This fact hit LeBlanc hard enough to cause a concussion just last week. 3. A key question is whether heading causes concussion. 4. Concussions are caused when a blow rotates and twists the brain in the skull, damaging brain tissue. 5. He hit his head hard enough to cause a concussion. 6. Considered a non-lethal weapon, they can break bones and cause serious concussion but rarely cause death. |