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These exercises were initially developed for men under 50 and women under 40 who had exaggerated lumbar lordosis, whose x-ray films showed decreased disc space between lumbar spine segments (L1-S1), and whose symptoms were chronic, but low grade. [citation needed]
The intervertebral disc is removed and replaced with a small plug of bone or other graft substitute, along with a height restoration device to un-impinge nerves, and in time, the vertebrae will fuse together. Intervertebral disc arthroplasty: also called Artificial Disc Replacement (ADR), or Total Disc Replacement (TDR), is a type of arthroplasty.
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).
Any forward slipping of one vertebra on another can cause spinal stenosis by narrowing the canal. If this forward slipping narrows the canal sufficiently, and impinges on the contents of the spinal column, it is spinal stenosis by definition. If associated symptoms of narrowing exist, the diagnosis of spinal stenosis is confirmed.
Spinal stenosis is an abnormal narrowing of the spinal canal or neural foramen that results in pressure on the spinal cord or nerve roots. [6] Symptoms may include pain, numbness, or weakness in the arms or legs. [1]
Cervical spinal stenosis is a bone disease involving the narrowing of the spinal canal at the level of the neck. It is frequently due to chronic degeneration, [ 1 ] but may also be congenital. Treatment is frequently surgical.
Lumbar spinal stenosis is classified as a narrowing of the spinal canal in the lumbar region of the vertebrae. This may lead to compression of the nerve root of the spinal cord and result in pain of the lower back and lower extremities.
An intervertebral disc (British English), also spelled intervertebral disk (American English), lies between adjacent vertebrae in the vertebral column.Each disc forms a fibrocartilaginous joint (a symphysis), to allow slight movement of the vertebrae, to act as a ligament to hold the vertebrae together, and to function as a shock absorber for the spine.