the brain, spinal cord, and nerves work together
cervical_spinal_nerve is spinal_nerve. spinal_cord is neural_structure. spinal_nerve_root is spinal_nerve. coccygeal_spinal_nerve is spinal_nerve. lumbar_nerve is spinal_nerve. coccygeal_nerve is spinal_nerve. spinal_nerve is nerve. lumbar_spinal_nerve is spinal_nerve.