The phrase "lumbar vertebra" refers to the specific bones in our lower back that make up the spine. They are located between the chest and the pelvis, helping to support our weight and allowing us to move and bend. Full definition
An anesthesiologist or nurse anesthetist performs this form of anesthesia; the procedure starts with a local anesthetic, followed by the insertion of a long needle (used to guide a thin catheter) between two of the lower lumbar vertebrae in your low back. (swanling.com)
(True sciatic pain occurs when the sciatic nerve is pinched by lumbar vertebrae at the nerve root, or trapped under or inbetween tight deep hip rotator muscles.) (physiologicnyc.com)
Common diseases observed in rabbits include dental disease / malocclusion, gastrointestinal stasis, upper respiratory disease, external parasites like mites and fleas, cecal dysbiosis (loose stool), arthritis of the lower lumbar vertebrae and kidney failure. (orlandoexoticveterinarian.com)