骶骨上关节突和外侧沟的形态及其临床意义

Morphology of Superior Articular Processes and Lateral Grooves of the Sacrum and Its Clinical Significance

对260个骶骨的上关节突外侧沟作了观察,以它和上关节突关节面下缘的关系分成四型。其中Ⅰ型(钩绕型)占26.2%.对上关节突关节面的位置、形态和不对称性作了统计;并在15侧尸体上观察了我五腰神经后内侧支的走行特点。指出第五腰神经后内侧支在Ⅰ型外侧沟中有可能被第五腰椎下关节突压榨引起腰骶部疼痛。

The superior articular processes and lateral grooves of the sacrum were observedon 260 dried adult sacrums.The lateral groove is situated between the suprior art-icular process and lateral mass of the sacrum.On the average,it is 12.5mm inlength,3.3mm in width and 6.8mm in depth at its middle point.According to therelation between the lateral groove and the lower border of the articular surfaceof the superior articular process,the sacrum may be divided into four types.Thefirst type(26.6%)is that the lateral groove wind with the lower border.Becauseof the posterior medial branch of the fifth lumbar nerve constantly passingthrough the lateral groove,it may be pressed in the lateral groove in this type bythe Inferior articular process of the fifth lumbar vertebra and pain could thus beinduced in the lumbar sacrum area.