Department of Neuroradiology, University Hospital, Groningen, The Netherlands.
Eur Spine J. 1992 Jun;1(1):7-12. doi: 10.1007/BF00302135.
This paper starts from the concept that acceleration injury of the cervical spine is caused by hypertranslation of the head with respect to the trunk, and not by hyperflexion or hyperextension. This first part of the paper studies the effect of normal head translation upon cervical spine posture and motion. Lateral radiographs of the neck in chin-out and chin-in positions reveal that this translation produces maximal motion at the cranio-vertebral junction C0-2, from full extension in chin-out position to full flexion in chin-in position. Motion decreases from C2-3 downward. Below C6 the direction of motion is reversed. The normal range of head translation is small, notably with a fixed thoracic spine. The hypothesis is developed that hypertranslation of the head will almost immediately result in damaging hyperflexion or hyperextension of the craniovertebral junction.
本文从颈椎加速损伤是由于头部相对于躯干过度平移而不是过度屈伸引起的这一概念出发。本文的第一部分研究了正常头部平移对颈椎姿势和运动的影响。颈部在下巴伸出和下巴收回位置的侧位片显示，这种平移在颅颈交界处 C0-2 产生最大的运动，从下巴伸出位置的完全伸展到下巴收回位置的完全屈曲。运动从 C2-3 向下减少。C6 以下，运动方向相反。头部平移的正常范围很小，尤其是在固定的胸脊柱时。假设头部的过度平移几乎会立即导致颅颈交界区的损伤性过度屈伸或过度伸展。
