脊髓麻醉，第二级，两小时以内

Werdnig-Hoffmann disease, progressive spinal muscular atrophy infant type

spinal cord

Spinal canal

cenral spinal cord dyndrome

cerebral spinal fluid

reticular formation 网状结构spinal cord

cord

segmenta medullae spinalis【解剖】;segments of spinal cord【解剖】;