An experimental study on the mechanism of brain injury by using a physical model of the human head

我们使用头部的物理模型进行了击打和坠落实验。头部顶枕中部区域受到冲击。在使用重锤（1480g）击打实验中，冲击力峰值为206kg，持续时间为2.6ms，头部加速度峰值为25.4g，持续时间为2.6ms。用轻锤（820g）击打时，冲击力峰值为200kg，持续时间为2.0ms；加速度峰值为23g，持续时间为2.0ms。在与汽车碰撞的坠落实验中，撞击速度在5.59 ~ 6.46km/h之间。在对引擎盖面板的冲击试验中，头部加速度峰值为13.6 ~ 35.4g，持续时间为19.5 ~ 38.0ms，对挡风玻璃的冲击试验为33.5 ~ 62.1g，持续时间为10.5 ~ 17.5ms，对挡泥板的冲击试验为45.3、52g，持续时间为15.0、14.0ms，对A柱面板的冲击试验为60.8、66.4、12.0ms。在与混凝土地板、铁板和木材碰撞的坠落实验中，撞击速度为6.25km/h ~ 6.57km/h。撞击混凝土地面时，头部加速度峰值为88.6g，持续时间为8.5ms；撞击铁板时，头部加速度峰值为78.4g，持续时间为9.0ms；撞击木材时，头部加速度峰值为74.8 g，持续时间为78.3g，持续时间为9.5ms。我们研究了脑损伤。在击打和坠落事故中，我们观察到几乎所有的病例都有脑挫伤。我们在受害人头部与引擎盖或挡风玻璃碰撞，以及脑挫伤与A柱面板碰撞的交通事故案例中确认了DAI。

We carried out blow and fall experiments using a physical model of the head. Midparietoccipital region of the head was impacted.In the blow experiment using a heavy hammer (1,480g), the peak value of the impact force was 206kg and the duration time was 2.6ms, and the peak value of the acceleration of the head was 25.4g and the duration time was 2.6ms. In the blow one using a light hammer (820g), the peak value of the impact force was 200kg and the duration time was 2.0ms and the peak value of the acceleration was 23g and the duration time was 2.0ms.In the fall experiment colliding with the automobile, impact velocity ranged from 5.59km/h to 6.46km/h. The peak value of the acceleration of the head ranged 13.6-35.4g and the duration time did 19.5-38.0ms in the impact experiments against the bonnet panel, 33.5-62.1g and 10.5-17.5ms in the ones against the windshield, 45.3 and 53.2g and 15.0 and 14.0ms in the ones against the mudguard panel, and 60.8 and 66.4g and 12.0ms in the ones against the A pillar panel.In the fall experiment colliding with a concrete floor, an iron plate and timber, impact velocity ranged from 6.25km/h to 6.57km/h. The peak value of the acceleration of the head was 88.6g and the duration time was 8.5ms in the impact experiment to a concrete floor, 78.4g and 9.0ms in the one to an iron plate, and 74.8 and 78.3g and 9.5ms in the ones against timber.we studied on brain injuries. In blow and fall accidents, we observed cerebral contusion in almost all cases. We recognized DAI in the traffic accident case in which the victim's head was collided against the bonnet panel or windshield, and cerebral contusion against the A pillar panel.