these investigations consisted of ( 1 ) anatomic observations on rnr in 117 fixed cadaveric specimens , ( 2 ) myelographic study in 117 patients with or without dlcs , ( 3 ) operative observation on neural elements with special reference to the cauda equina in 56 dlcs patients ( including a postoperative follow-up ) , and ( 4 ) electrophysiologic tests using spinal cord action potential recording under walking load preoperatively and intraoperative measurement of nerve conduction velocity of rnr .
C0007458
cauda equina
C0037925
spinal cord