Falling from a bike, a motorbike or a horse, or being tackled by an opponent player are just few examples of common situations where surprisingly violent impacts on the head can occur. Head impacts may cause Traumatic Brain Injury, TBI. Traumatic Brain Injury can lead to a wide range of physical, cognitive, social, behavioral and emotional problems, permanent disability, or even death. A single impact can cause devastating injuries, but also the frequency of impacts, number of impacts, and a long history of impacts play a role.