Your lumbar spine consists of the five vertebrae in your lower back. It provides support for the weight of your body, surrounds and protects your spinal cord, and allows for a wide range of body motions.

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. In humans, there are five lumbar vertebrae. The term is used to describe the anatomy of humans and quadrupeds, such as horses, pigs, or cattle.

The lumbar spine connects with the thoracic spine above at the thoracolumbar junction and the sacral spine below at the lumbosacral joint. The lumbar motion segments may be affected by congenital (birth-related), degenerative, traumatic, or inflammatory disorders.

Apr 23, 2019 · The lumbar vertebrae are bones that make up the spinal column or backbone, specifically within the lower back. These bones are below the cervical and thoracic vertebrae but above the sacrum or pelvis.

Nov 16, 2023 · The lumbar vertebrae are perhaps most easily defined by their stout and think vertebral bodies; they are relatively large, wider laterally compared to anteroposteriorly and thicker in its anterior half compared to posterior (which contributes to the lumbar lordosis). Their intervertebral surfaces are somewhat flattened or slightly concave ...

The lumbar spine contains 5 vertebrae, labeled L1 to L5, which progressively increase in size going down the lower back. The vertebrae are connected with joints at the back to enable bending and twisting movements of the spine.

Jul 30, 2023 · The lumbar region contains five vertebrae, denoted L1-L5. The intervertebral discs, along with the laminae, pedicles, and articular processes of adjacent vertebrae, create a space through which spinal nerves exit. The lumbar vertebrae, as a group, produce a lordotic curve.

May 24, 2022 · The lumbar vertebrae provide a protective casing for all the spinal nerve roots (cauda equina) at the end of the spinal cord. These nerves then run down into the legs and feet to control movement and sensation.

Mar 8, 2025 · The lumbar vertebrae are the some of the largest and heaviest vertebrae in the spine, second in size only to the sacrum. A cylinder of bone known as the vertebral body makes up the majority of the lumbar vertebrae's mass and bears most of the body's weight.

The Lumbar Vertebrae are larger and heavier than vertebral bodies in other regions. The lumbar vertebral body is kidney-shaped when viewed superiorly, so it is wider from side to side than from front to back, and a little thicker in front than in back with a thin cortical shell which surrounds cancellous bone.