vertebral lamina removed in lumbar laminectomy

Vertebral Lamina: Definition and Anatomy

Article reviewed and approved by Dr. Ibtissama Boukas, physician specializing in family medicine 

What is the vertebral lamina? This article explains everything you need to know about this component of the vertebral column.


Definition and anatomy of the vertebral body


Before talking about the vertebral laminae, it is worth briefly explaining the anatomy of the spine, And vertebrae that compose it.


La spine consists of the juxtaposition of bones called vertebrae. Also called rachis, it is separated as follows:


  • 7 cervical vertebrae
  • 12 thoracic (or dorsal) vertebrae
  • 5 lumbar vertebrae
  • 5 sacral vertebrae (forming the sacrum)
  • 4 coccygeal vertebrae (fused)


Here is a visual diagram of the spine:


juxtaposition of vertebrae forming the spinal column


In general, each vertebrate is composed of a vertebral body in its front part, and of a posterior arch at the back formed by the pedicles and the vertebral laminae.


vertebral lamina removed in lumbar laminectomy


The lamina is therefore the part of the vertebra which connects the spinous process (often called spinous process) and the transverse process (or transverse process). There are two blades per vertebra, located on either side of thespinous process. They are present at the cervical spine, dorsal and lumbar.



Pathologies related to the vertebral lamina


The vertebral lamina may be the fracture site.


vertebral lamina fracture


Treatment related to the vertebral lamina


The spinal lamina is often the site of surgery to relieve symptoms caused by pressure on the nerve roots. This can happen in the case of a narrow lumbar canal, or a herniated disc.


This intervention is called laminectomies


diagram explaining lumbar laminectomy


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