![]() ![]() The L5 vertebra is susceptible to spondylolysis, which is the fracture of the pars interarticularis (a small segment of bone from the vertebral arch joining the facet joints) most commonly due to repetitive stress on the bone.ġ Cramer GD. Facet joint syndrome: from diagnosis to interventional management. Available from: įacet joint pain may also occur due to due to inflammatory conditions, such as rheumatoid arthritis or degenerative spondylolisthesis.ĥ Perolat R, Kastler A, Nicot B, et al. Treasure Island (FL): StatPearls Publishing 2019 Jan. The lumbosacral joint may develop wear-and-tear arthritis (osteoarthritis) over time due to its high load-bearing function.Ĥ Alexander CE, Varacallo M. See Lumbar Herniated Disc: What You Should Know Available from: Ī steeper inclination of this disc leads to a higher degree of shear stresses and increases the risk disc of injury and degeneration. Lower back disc herniation typically occurs at the L5-S1 level.ģ Donnally III CJ, Butler AJ, Varacallo M. The L5-S1 situated at the bottom of the vertebral column is typically subject to excessive biomechanical stress, leading to more loads and an increased risk of injury. The L5-S1 motion segment provides a bony enclosure for the cauda equina (nerves that continue down from the spinal cord) and other delicate structures. The L5 myotome is a group of muscles controlled by the L5 spinal nerve and includes specific muscles in the pelvis and legs, which are responsible for leg and foot movements.The L5 dermatome is an area of skin that receives sensations through the L5 spinal nerve and includes parts of the knee, leg, and foot.Ģ Kayalioglu G.These nerve roots join with other nerves to form bigger nerves that extend down the spine and travel down each leg. ![]() The L5 spinal nerve roots exit the spinal cord through small bony openings (intervertebral foramina) on the left and right sides of the spinal canal. This disc provides cushioning and shock-absorbing functions to protect the vertebrae during spinal movements. A disc made of a gel-like material (nucleus pulposus) surrounded by a thick fibrous ring (annulus fibrosus) is situated between the vertebral bodies of L5 and S1. L5 and S1 are joined by the lumbosacral facet joints lined with articular cartilage.There are bony openings (foramina) on the right and left sides of this ridge. At the back, the S1 vertebra contains a long bony prominence called the median ridge. S1 consists of a body on the top with wing-shaped bones on either side, called the alae. S1, also called the sacral base, is the upper and wider end of the triangular-shaped sacrum.These protrusions serve as attachment points for ligaments. L5 consists of a vertebral body in front and an arch in the back that has 3 bony protrusions: a prominent spinous process in the middle and two transverse processes on the sides.The L5 and S1 vertebrae have different features: This motion segment typically includes the following structures: Anatomy of the L5-S1 Spinal Motion Segment ![]()
0 Comments
Leave a Reply. |