Lumbar vertebra
Lumbar Vertebra
The Lumbar Vertebra (pronounced: LUM-bar ver-te-bra) is a type of vertebra that forms the lower part of the spine. The term "lumbar" is derived from the Latin word "lumbus," meaning loin, and "vertebra" is derived from the Latin word "vertere," meaning to turn.
Structure
The lumbar vertebrae are the largest segments of the vertebral column and are characterized by the absence of the foramen transversarium within the transverse process and by the absence of facets on the sides of the body. They are designated L1 to L5, starting at the top. The lumbar vertebrae help support the weight of the body, and permit movement.
Function
The lumbar vertebrae are responsible for bearing the weight of the body and for the execution of movements such as flexion and extension of the spine, lateral flexion, and rotation. They also protect the spinal cord and nerves.
Clinical Significance
Conditions such as lumbar disc disease, lumbar stenosis, and spondylolisthesis can affect the lumbar vertebrae. These conditions can cause pain and limit movement. Treatment options include physical therapy, medication, and in some cases, surgery.
Related Terms
- Vertebral column: The vertebral column, also known as the backbone or spine, is part of the axial skeleton.
- Foramen transversarium: An opening in each of the transverse processes of the cervical vertebrae for the passage of the vertebral artery and vein and a plexus of sympathetic nerves.
- Lumbar disc disease: A condition where a compromised disc in the lumbar spine causes low back pain.
- Lumbar stenosis: A narrowing of the spinal canal in the lower back, or lumbar area, which can put pressure on your spinal cord and the nerves.
- Spondylolisthesis: A spinal disorder in which a bone (vertebra) slips forward onto the bone below it.
External links
- Medical encyclopedia article on Lumbar vertebra
- Wikipedia's article - Lumbar vertebra
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