Penning L
Department of Diagnostic Radiology, University Hospital of Groningen AZG, The Netherlands.
Eur Spine J. 1995;4(2):126-32. doi: 10.1007/BF00278925.
This paper, based on functional radiological knowledge of normal cervical spine kinematics, develops the hypothesis that compressive vertebral injury can be produced by abrupt reversal of curve between hyperflexed and hyperextended parts of the cervical spine. Reversal of curve occurs when the main vector of a compressive force passes between two centers of flexion-extension motion. The hypothesis more clearly explains reverse dislocation of fractured vertebrae than the current concept of Whitley and Forsyth of motion of the head through an arc. The mechanism of injuries with characteristics of hyperflexion of one segment and hyperextension of an adjacent segment, e.g., in certain types of hangman's fractures, is better understood. The hypothesis is expected to be helpful in guiding experimental cervical spine injury, as it relates direction of force to level and type of the resulting vertebral injury.
本文基于正常颈椎运动学的功能放射学知识，提出假说：颈椎过度屈曲和过度伸展部位之间的曲线突然反转可导致椎体压缩性损伤。当压缩力的主向量在两个屈伸运动中心之间通过时，就会发生曲线反转。与目前惠特利和福赛思关于头部通过弧线运动的概念相比，该假说能更清楚地解释骨折椎体的反向脱位。对于某些类型的绞刑者骨折等具有一个节段过度屈曲和相邻节段过度伸展特征的损伤机制，能有更好的理解。该假说有望有助于指导颈椎损伤实验，因为它将力的方向与所导致的椎体损伤的水平和类型联系起来。
