In recent years there has been an outpouring of research looking at the mechanisms and treatment options for concussions. While once previously thought to be an isolated mild brain injury, more evidence is demonstrating a dual injury that occurs both in the brain and neck when someone has sustained a concussion. When measured, it has been found that it takes 70 – 120 g-force to cause a concussion, while a neck injury only requires 4 g-force.