摘要
目的:观察马尾神经的形态特征,为胸腰椎骨折脱位所致截瘫患者的神经根吻合术提供解剖学依据。方法:取24具成人脊柱标本,暴露T11节段以下脊髓神经根,观察马尾神经的形态特征;测量T11￣S3各神经根穿出相应脊髓节的中点与不同损伤平面(T11、T12椎体下缘平面)之间的距离;观察脊髓圆锥下极位置变异情况。结果:马尾神经根的排列位置很有规律,各神经根可以辨别。T11、T12椎体下缘平面以上可利用的神经根分别主要为T11￣L1、T11￣L4神经根,损伤平面以上可利用的神经根数目与损伤平面高低呈负相关,与脊髓圆锥位置高低呈正相关。结论:损伤平面以上有一些残存的神经根可供利用,椎管内神经根吻合需考虑损伤平面高低与脊髓圆锥下极位置的关系。
Objective：To study the anatomical feature of cauda equina in spinal canal and provide anatomical basis for nerve root anastomose for paraplegia patients caused by fracture and dislocation of thoracolumbar vertebra.Method：Spinal cord and nerve roots under T11 level were dissected on 24 adult spinal specimens. The lower edge of T11、T12 was identified and marked.The anatomical feature of cauda equina was observed. The distances from the lower edge of T11 ,T12 vertebra （hypothetical injured level） to every mid-point of T11-S3 spinal cord segment were measured separately.The available nerve roots above injured level were counted.Their relationship to the injured level,to the terminal position of comus medullaris was analyzed through Spearman Rank Correlation.Result：Nerve roots in vertebral canal arranged regulatly and could be recognized from each other.The proximal extremity of T11-L1 ,T11-L4 nerve roots was above the level of lower edge of T11 ,T12 vertebra separately.The number of available nerve roots was negative correlation to the site of injured nerve roots,and was positive correlation to the site of comus medullaris.Conclusion：A few nerve roots left above the injured level can be available.The position of injured nerve roots and comus medullaris should be considered while performing nerve root anastomosis in spinal canal.
出处
《中国脊柱脊髓杂志》
CAS
CSCD
2005年第9期546-548,共3页
Chinese Journal of Spine and Spinal Cord
关键词
神经根吻合
脊髓圆锥
局部解剖学
Nerve root anastomose
Comus medullaris
Regional anatomy
