Brain injury without head injury. Some physics of automobile collisions with particular reference to brain injuries occurring without physical head trauma.
Brain injury without head injury. Some physics of automobile collisions with particular reference to brain injuries occurring without physical head trauma.
复制标题
脑部受伤，但没有头部受伤。
作者：
Nils R. Varney;R. Varney
经典的运动学公式a=（v2-v0（2））/2s，将减速与速度变化和变化期间的位移相关联，用于确定机动车辆的乘员（及其头部）在碰撞期间经历的加速度。事故中乘员的位移s通常可以从残骸的变形中确定，从而产生关于脑损伤可能性的关键信息。收集了15起事故的数据，并计算了近似加速度。与此同时，还获得了每一位事故受害者的医疗和神经心理学数据。之所以选择这些事故和相关的受害者（一个特殊案例除外），是因为在任何情况下，受害者都没有遭受直接的头部接触伤害。然而，所有患者均遭受了闭合性头部创伤患者的典型神经和/或神经心理损伤。该论文表明，从30 g到200 g以上的减速，但没有头骨的影响，脑损伤的结果。
The classic kinematic formula, a=(v2-v0(2))/2s, relating deceleration to change of velocity and displacement during the change, is used to determine the acceleration experienced by the occupants of motor vehicles (and their heads) during collisions. The displacement, s, of the occupants in the accident can often be determined from the deformation of the wreckage, thus yielding this critical information about potential for brain injury. Data from 15 accidents are assembled and approximate accelerations computed. At the same time medical and neuropsychological data have been obtained for each of the accident victims. These accidents and the associated victims (except for one special case) have been selected because in no case has the victim suffered a direct head-contact injury. Nevertheless, all suffered neurologic and/or neuropsychological injuries typical of patients with closed head trauma. The paper demonstrates that with decelerations from 30 g to more than 200 g yet without skull impacts, brain damage results.