321 Effect of Impact Relaxation Material against Head Injury at Occiput Impact

Abstract

In many junior high schools, judo became a compulsory course in 2012. However, the number of participants, in particular beginners, who die or arc injured in judo is higher than that for other sports. For this reason, there is a fear that there will be a drastic increase in the number of judo-related accidents leading to death or injury in junior high schools. Thee most serious form of head injury is acute subdural hematoma (ASDH). Therefore, we need to prevent acute subdural hematoma that is the primary cause of death. In this study, we developed the theoretical model to describe the response of the brain in the skull during the occiput impact. Then, the effects of material properties of impact objects and headgears on the relative displacement between brain and skull were discussed. Moreover, the theoretical model was compared with the experiment of brain-skull physical model.