lumbar nerve

… (C), 12 thoracic (T), 5 lumbar (L), 5 sacral (S), and 1 coccygeal (Coc). Spinal nerve roots emerge via intervertebral foramina; lumbar and sacral spinal roots, descending for some distance within the subarachnoid space before reaching the appropriate foramina, produce a group of nerve roots at the conus medullaris known…

12 thoracic (T₁–T₁₂), 5 lumbar (L₁–L₅), 5 sacral (S₁–S₅), and 1 coccygeal (Coc₁). Each spinal nerve exits the vertebral canal through an opening called the intervertebral foramen. The first spinal nerve (C₁) exits the vertebral canal between the skull and the first cervical vertebra; consequently, spinal