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2. Disc herniation - Wikipedia

   en.wikipedia.org/wiki/Disc_herniation

   Disc herniation can occur in any disc in the spine, but the two most common forms are lumbar disc herniation and cervical disc herniation. The former is the most common, causing low back pain (lumbago) and often leg pain as well, in which case it is commonly referred to as sciatica. Lumbar disc herniation occurs 15 times more often than ...

3. Spondylolisthesis - Wikipedia

   en.wikipedia.org/wiki/Spondylolisthesis

   Spondylolisthesis is when one spinal vertebra slips out of place compared to another. [1] While some medical dictionaries define spondylolisthesis specifically as the forward or anterior displacement of a vertebra over the vertebra inferior to it (or the sacrum), [2] [3] it is often defined in medical textbooks as displacement in any direction.

4. Spinal fusion - Wikipedia

   en.wikipedia.org/wiki/Spinal_fusion

   Herniated disc pressing on spinal nerves. Spinal fusion can be used to treat a variety of conditions affecting any level of the spine—lumbar, cervical and thoracic. In general, spinal fusion is performed to decompress and stabilize the spine. [4] The greatest benefit appears to be in spondylolisthesis, while evidence is weaker for spinal ...

5. Retrolisthesis - Wikipedia

   en.wikipedia.org/wiki/Retrolisthesis

   Retrolisthesis can be classified as a form of spondylolisthesis, since spondylolisthesis is often defined in the literature as displacement in any direction. [1] [2] Yet, medical dictionaries usually define spondylolisthesis specifically as the forward or anterior displacement of a vertebra over the vertebra inferior to it (or the sacrum).

6. Spondylosis - Wikipedia

   en.wikipedia.org/wiki/Spondylosis

   Cervical X-rays may show osteophytes, decreased intervertebral disc height, narrowing of the spinal canal, and abnormal alignment (kyphosis of the cervical spine). Flexion and extension view of the cervical spine is helpful to look for spondylolisthesis (slippage of one vertebra over another).

7. Williams Flexion Exercises - Wikipedia

   en.wikipedia.org/wiki/Williams_Flexion_Exercises

   At the 4th and 5th lumbar levels, great pressure is said to be exerted on the posterior aspect of each vertebra and transferred from the vertebra to the disc. Williams specified that in most cases the 5th lumbar disc ruptures and the nuclear material of the disc moves into the spinal canal causing pressure on the spinal nerves.