View Anatomy Lumbar Spine Diagram PNG. Osteology, myology of the spine. The muscles of the lower back help stabilize, rotate, flex, and extend the spinal column, which is a bony tower of 24 vertebrae that gives the body structure and houses the spinal cord.
Below this level, the remaining nerves form the cauda equina, a bundle of nerves resembling a horse's tail.
The lumbosacral joint (between l5 and s1 vertebrae) is strengthened by the iliolumbar ligaments. Learn about the features unique to the bones in all portions of the spinal column. Even though the lower portion of your spine holds most of the body's weight, each segment relies upon the strength of the others to function properly. Learn about the anatomy of the lumbar spine including the potential problems that can occur in this area of the back.