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The L4 and L5 are the two lowest vertebrae of the lumbar spine. Together with the intervertebral disc, joints, nerves, and soft tissues, the L4-L5 spinal motion segment provides a variety of functions, including supporting the upper body and allowing trunk motion in multiple directions. 1 Waldman SD.
Your lumbar vertebrae, known as L1 to L5, are the largest of your entire spine. Your lumbar spine is located below your 12 chest (thoracic) vertebra and above the five fused bones that make up your triangular-shaped sacrum bone.
The L4 and L5 vertebrae may be fused together to give stability to the lumbar spine. Surgery may be considered when the neurological deficits, such as numbness and/or weakness continue to worsen despite several weeks of nonsurgical treatments.
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 chest, region of the spine, and the sacrum.
The lumbar vertebrae are five in number and desginated as vertebrae L1-L5. They are primarily responsible for bearing the weight of the upper body (and permitting movement) and consequently represent the largest individual segments of the vertebral column.
The lumbar vertebrae (L1-L5) are much larger compared to other regions of the vertebral column, allowing them to absorb axial forces delivered from the head, neck, and trunk. The lumbar vertebrae form a canal that serves to protect the spinal cord and spinal nerves.
The L5 vertebra is located in the spinal column of the lumbar (lower back) region inferior to the L4 vertebra and superior to the sacrum. Like the other lumbar vertebrae, L5 has a large, roughly cylindrical region of bone known as the body that makes up most of its mass.
Unlike the cervical vertebrae in the neck, the lumbar vertebrae lack the transverse foramina in the transverse processes, and also lack facets to either side of the body. The fifth lumbar vertebra is distinct from the L1-4 vertebrae in being much larger on its front side than in the back.
The fifth lumbar vertebrae, L5, has some distinctive characteristics of its own. It has a notably large vertebral body and transverse processes as it carries the weight of the entire upper body. Fig 1.1. Superior view of a lumbar vertebrae, showing its characteristic features. Joints. There are two types of joint in the lumbar spine.
Lumbar vertebrae: Numbered L1 through L5, these odd-shaped vertebrae signal the end of the typical bones of the spinal column. Sacrum: This triangle-shaped bone is made up of five fused...