High - speed film revealed that the dummy's head was not properly contained during the impact, increasing the likelihood of head contact with parts of the car interior. (euroncap.com)
Any event involving head contact in which a player did not continue playing immediately afterward was defined as a head collision event. (sciencedaily.com)
He has been developing striking techniques to diminish the negative impacts of head contact, for nearly 10 years. (sportstarsmag.com)