犬马尾与骶神经根的解剖学观察

Anatomical observation of the cauda equina and sacral roots in canine

目的 :为从马尾和骶神经根途径开展犬的神经泌尿学研究提供解剖依据。方法 :对 3只犬灌注后进行解剖 ,并对 2 2只犬进行术中观察 ,总结马尾、骶神经根的解剖特征。结果 :犬的盆底器官由S1～S2脊髓节段和神经根支配 ;脊髓圆锥延续较长 ,达L6椎体下缘 ,而马尾神经较短 ;髓神经前后根出硬膜后 ,有各自独立的硬膜囊包绕直至后根神经节处 ,长 1～ 1.5cm。结论 :犬马尾和骶神经根的解剖特征与人类不同。

Objective:To provide anatomical basis for the neurourological study of the cauda equina and sacral roots in canine.Methods:Anatomical character of the cauda equina and sacral roots were observed and summaried on 22 dogs when they are dissecting after perfusion.Results:The neural innervations of pelvic were provided by S 1 S 3 spinal cord segments and corresponding sacral roots.The conus medullary were long and teminated at the 6th lumbar vertebrae.The ventral and dorsal foots of spinal nerves were surrounded by meningeal tubes separately for 1～1.5 cm,till the point of dorsal root ganglion.Conclusion:There are some difference in anatomical character of cauda equina and sacral roots between dog and human.