The redundant nerve roots (RNR) have been discussed sporadically in both the neurosurgical and scandinavian radiological literature. The myelographic appearance of patients with this disorder might suggest the possibility of an arteriovenous malformation or perhaps dilated venous channels. l. Among 32 cases of RNR, there were 16 males and 16 females, and the age of patients was 56.3 years in average ranging from 41 to 74 years, and the magnitude of RNR were mild type in 15 cases, moderate type in 9 cases and severe type in 8 cases. 2. When the number of block was multisegmental, the magnitude of RNR was exaggerated (r = 0.45664,^**p<0.01). 3. When the extent of block was increased, the magnitude of RNR was exaggerated (r=0.6728,^***p < 0.001). 4. With trunk extended as dynamic factor, myelographic block was exaggerated and the magnitude of RNR was exaggerated (r=0.50765,^***p<0.001). 5. In eighteen patients, surgical decompression were done and the postoperative results were moderately or markedly improved. 6. The authors believe that the RNR have neurZonal losses resulting from a longer duration stenosis that suggests a sort of friction neuritis.