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. The spinal cord and its nerves are the means by which the body and brain communicate with one another. Together, the brain and spinal cord make up the central nervous system.
The spine's four sections, from top to bottom, are the cervical (neck), thoracic (abdomen,) lumbar (lower back), and sacral (toward tailbone). Throughout the spine, intervertebral discs made of cushioning material both pad and connect the vertebrae.
The lumbo-sacral spine includes:
Muscles connect to the vertebrae and bones via ligaments, flexible bands of fibrous tissue. The deep muscles of the back fit into or affix parts of themselves to the grooves in the spinous processes, or the protrusion of the bone than can be felt through the skin.
Important muscles of the lumbar spine include:
Lower back pain is a common ailment. This can arise for reasons ranging from improper posture to a compression fracture. Lower back issues can put pressure on the lumbar spine nerves and create even stronger pain as the nerves become pinched or irritated from friction. Some common causes of reoccurring lower back pain include: