2018 Volume 20 Issue 4 Pages 175-188
Head trauma accidents caused by falling indoors have been reported. The purpose of this study is to evaluate quantitatively the protective effect of a headband against head impact caused by falls by using computer simulation. Firstly, four types of movements of falls resulting from faint, slip, trip and step down were simulated by using a whole body numerical model and four regions of bruises on the frontal, parietal, temporal, and occipital region were chosen as the impact condition of the head. Secondly, the posture, translational and rotational velocity just before the collision of the head were input to a finite element human head model to simulate the collision motion of the head against the floor. A headband model made from EVA （ ethylene-vinyl acetate） foam is constructed, and two kinds of floor （ tile and wooden flooring ） are assumed and modeled. For each scenario of falls, head collisions with and without headband were simulated and the risk of fracture, cerebral contusion and concussion was calculated from the obtained mechanical responses during head collision. As a result, the use of the headband generally reduced the risk of head injury in indoor fall accidents, even though there are differences in protection effect depending on the postures of falling and the type of floor.