摘要
目的：为限制性椎板切除的ＳＰＲ提供解剖学依据。方法：在２０例成人防腐灌注红色乳胶的脊柱标本上，对近端马尾神经进行巨—微解剖学观察。结果：马尾近端，Ｌ１前后根之间有最下一对齿状韧带，前根位于相应后根的前内侧。各节段后根在马尾近端呈冠状位的内外平排，从内向外依次为Ｓ２～Ｌ１的后根；各节段后根进脊髓处，Ｌ５和Ｓ１后根之间有明显分界线，相邻节段后根之间，均有恒定小静脉分隔。以终丝起点为定点，各节段后根与终丝之间的距离和成角从Ｓ２到Ｌ１逐渐增加。结论：在限制性椎板切除的ＳＰＲ术中，前、后根的鉴别主要依靠脊髓的外侧索和Ｌ１前后根之间的最下一对齿状韧带；后根节段的鉴别主要依靠后根连脊髓处，Ｌ５和Ｓ１之间有明显分界、相邻节段后根间有恒定小静脉来定性鉴别。也可根据终丝起点水平。
Objective: To provide morphologic bases of limited laminectomy selective posterior rhizotomy (SPR). Methods:The L 1～S 2 segments nerve roots of cauda equina were observed and measured in 20 antiseptic lumbosacral spine specimens perfused with red emulsion.Results:The lowest denticulate ligament was located between the anterior root and posterior root of L 1. The anterior root was at the anateromedial of the corresponding posterior root. All dorsal roots of S 2～L 1 arranged from medial to lateral parallel on the coronal section in the proximal cauda equina.At the entry of dorsal roots to the spine, there was a boundary line between L 5 and S 1 dorsal roots, meanwhile a permanent vein could be found between all adjacent dorsal roots. From the filum terminal, the distance and angle between the dorasal roots and filum terminal were gradually increased for S 2～L 1 .Conclusions: In limited laminectomy of SPR ,the anterior and pesterior roots could be identified by the lateral funiculus of spinal cord and the lowest denticulate ligament.The segment of the posterior roots could be discriminated by the boundary line between L 5 and S 1 dorsal roots and a permanent vein between the adjacent segments or the distance and angle between the dorsal roots and filum terminal at the starting point of filum terminal.
出处
《中国临床解剖学杂志》
CSCD
北大核心
1999年第2期100-103,共4页
Chinese Journal of Clinical Anatomy
基金
广东省自然科学基金
