Mayoux-Benhamou M A, Revel M, Aaron C, Chomette G, Amor B
Laboratoire d'Anatomie, CHU Cochin Port-Royal, Paris, France.
Surg Radiol Anat. 1989;11(2):97-102. doi: 10.1007/BF02096463.
The authors undertook a morphometric study of the intervertebral foramina in anatomic specimens of spines unaffected by degenerative lesions. They studied the variations in shape and size of 38 intervertebral foramina during flexion-extension movements and following an isolated disc collapse. The cast technique takes into account the bony prominences, the bulge of the disc anteriorly and of the capsulo-ligamentous structures posteriorly. In flexion, all the diameters of the foramina are maximal. In full extension all the diameters decrease significantly: the pedicles come closer together, the disc bulges posteriorly and the ligamentum flavum is pushed forward by the superior articular process of the underlying vertebra. A disc collapse of 4 mm decreases all the diameters, and in this case lumbar extension results in a sufficient decrease of foraminal diameter to threaten the nerve root.
作者对未受退变病变影响的脊柱解剖标本中的椎间孔进行了形态测量研究。他们研究了38个椎间孔在屈伸运动过程中以及在孤立性椎间盘塌陷后的形状和大小变化。铸型技术考虑了骨突、椎间盘前方的膨出以及后方的关节囊韧带结构的膨出。在屈曲时，椎间孔的所有直径均最大。在完全伸展时，所有直径均显著减小：椎弓根相互靠近，椎间盘向后膨出，黄韧带被下方椎体的上关节突向前推挤。4毫米的椎间盘塌陷会使所有直径减小，在这种情况下，腰椎伸展导致椎间孔直径充分减小，从而威胁神经根。
