Lumbosacral Anatomy

This triangle shaped bone is made up of five fused vertebrae. The lumbar spine meets the sacrum at the lumbosacral joint l5 s1.

Anatomy Of The Lumbar Spine Semantic Scholar

Lumbar spine anatomy helps you understand low back pain.

Lumbosacral anatomy. The lumbar spine typically has a slight inward curve known as lordosis. The lumbar spines lowest two spinal segments l4 l5 and l5 s1. Numbered l1 through l5 these odd shaped vertebrae signal the end of the typical bones of the spinal column.

In this region the curvature of the spine changes from lumbar lordosis forward curve to sacral kyphosis backward curve. It is located in the lumbar region within the substance of the psoas major muscle and anterior to the transverse processes of the lumbar vertebrae. The lower the vertebra is in the spinal column the more weight it must bear.

The lumbar spine has several distinguishing characteristics. The lumbar region is situated between the thoracic or chest region of the spine and the sacrum. A cylinder of bone known as the vertebral body makes up the majority of the lumbar vertebraes mass and bears most of the bodys weight.

Posteriorly the body is connected to a thin ring of bone known as the arch. The lumbar vertebrae are the some of the largest and heaviest vertebrae in the spine second in size only to the sacrum. Now that you have learned about lumbar spine anatomy perhaps you can better understand whats causing your low back pain.

The l5 s1 spinal motion segment also called the lumbosacral joint is the transition region between the lumbar spine and sacral spine in the lower back. The lumbo sacral spine includes. The lower back region.

The lumbar plexus is a network of nerve fibres that supplies the skin and musculature of the lower limb. This review will focus on the clinical significance of lstv disruptions in normal spine biomechanics imaging techniques diagnosis and treatment. Lumbar spine anatomy video.

The complex anatomy of the lumbar spine is a remarkable combination of these strong vertebrae multiple bony elements linked by joint capsules and flexible ligamentstendons large muscles and. Presence of four rib free lumbar type vertebrae which may have the following features wedging of the lowest lumbar transitional vertebra. It fits like a wedge into the back of the pelvis at the hips.

Lumbosacral transitional vertebrae lstv are increasingly recognized as a common anatomical variant associated with altered patterns of degenerative spine changes. Hypoplastic or absent facet joints or intervertebral disc. The lumbar spine is an intricate system and an injury to the vertebrae eg spinal fracure or to the discs eg herniated disc can cause pain.

The lumbar region of the spine more commonly known as the lower back consists of five vertebrae labeled l1 through l5. L5 s1 helps transfer loads from the spine into the pelvis and legs.

Figure The Lumbosacral Plexus Plan Of Lumbar Plexus