Your lumbar spine is a five vertebral bone section of your spine. This region is more commonly called your lower back.

The lumbar portion of the spine bears the most body weight and also provides the most flexibility, a combination that makes it susceptible to injury and wear and tear over time.

The lumbar vertebrae are located between the thoracic vertebrae and pelvis. They form the lower part of the back in humans, and the tail end of the back in quadrupeds.

Learn about the anatomy of the lumbar spine including the potential problems that can occur in this area of the back.

Depending on the type and severity of the underlying cause, the L4-L5 motion segment may cause lumbar radicular pain of the L4 and/or L5 spinal nerves, also called sciatica.

Spinal motion segments through the lumbar spine provide a combination of flexibility and motion, especially the lower two segments named L4-L5 and L5-S1. Most acute low back pain results …

Mar 25, 2024 · What Is Low Back Pain? The low back, also called the lumbar region, is the area of the back that starts below the ribcage. Almost everyone has low back pain at some point in life.

May 24, 2022 · The lumbar spine is the third and lowermost part of the spinal column, consisting of 5 lumbar vertebrae, L1-L5. They are found in the lower back, supporting the body’s weight …

Feb 26, 2025 · The lumbar region of the spine, more commonly known as the lower back, consists of five vertebrae labeled L1 through L5. The lumbar region is situated between the thoracic, or …

Several structures in the lumbar spine can cause lower back pain, including the nerve roots that exit the spine, facet joints, intervertebral discs, vertebral bones, and the spinal muscles. Many …