Last updated: 6th March, 2020 A lumbosacral joint (L5-S1) comprises of 5 vertebrae in the lumbar segment of the spine (L1 to L5) and the sacrum (S1). Sacrum connects to two iliac bones of the pelvis forming a sacroiliac joint. It bears the load of the entire cervical, thoracic, and lumbar segments. Coccyx lies below sacrum. Nerve […]