Spinal nerve, in vertebrates, any one of many paired peripheral nerves that arise from the spinal cord. In humans there are 31 pairs: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal. Each pair connects the spinal cord with a specific region of the body.
There are 8 pairs of spinal nerves in the lumbar region of the spinal cord. These are: L1-S1, L2-S2, L3-S3, L4-S4, L5-S5, L6-S6, L7-S7, and L8-S8.