髓管

是指位于下腰部的坐骨神经，受到外力的压迫而产生后下腰部疼痛并反射到病侧下肢的情形。

Werdnig-Hoffmann disease, progressive spinal muscular atrophy infant type

spinal cord

spinal

spinal stenosis

cerebral spinal fluid

reticulospinal tract

Spinal anesthesia,level 1

juvenile spinal muscular atrophy