Klein J A, Hickey D S, Hukins D W
J Biomech. 1983;16(3):211-7. doi: 10.1016/0021-9290(83)90128-8.
An analysis of the bulging of the annulus fibrosus as a function of the height of the intervertebral disc during compression is presented. The theory was compared with the results of experimental tests on rabbit lumbar discs. When viewed in profile the ventral bulge closely resembled an arc of a circle; at each stage of compression it appeared to extend from the cranial to the caudal extremities of the annulus fibrosus. The radius of curvature of the arc was measured as a function of disc height and the results compared with theoretical predictions. Good agreement was obtained if it was assumed that about half the volume change swept out by the approach of the cranial and caudal end-plates was accommodated by the annular bulge. The lengths of the collagenous fibres reinforcing the outer lamella of the ventral annulus were estimated from the dimensions of the ventral bulge; no appreciable length increase appeared to accompany compression.
本文对纤维环在压缩过程中随椎间盘高度变化而膨出的情况进行了分析。该理论与兔腰椎间盘实验测试结果进行了比较。从侧面观察时，腹侧膨出非常类似于一段圆弧；在压缩的每个阶段，它似乎从纤维环的头端延伸至尾端。测量了该弧的曲率半径随椎间盘高度的变化，并将结果与理论预测进行了比较。如果假设头端和尾端终板靠近所扫过的体积变化中约一半由环形膨出来容纳，那么就会得到很好的一致性。根据腹侧膨出的尺寸估计了加固腹侧纤维环外层的胶原纤维长度；压缩过程中似乎没有明显的长度增加。
