Glossary: S
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Sacral:
The base of the lumbar spine which connects the spine to the pelvis.
Sciatica:
Irritation of the sciatic nerve which is the largest nerve in the body and travels down the legs.
Scoliosis:
A curvature of the spine which occurs most frequently in young adolescent females.
Screw:
Usually made of titanium and is placed in either the front or back of the spine.
Sequestered Disc Fragment:
Occurs when a portion of the disc breaks off completely and pushes on the nerves to the arms or legs.
Spina Bifida:
A congenital problem which occurs due to incomplete formation of the back of the spine.
Spinal Cord:
The connection between the brain stem and the nerves which allows motion and sensation.
Spinal Fluid:
The clear fluid which surrounds the spinal cord and nerves in the spine.
Spinous Process:
The back of the spine bones; this can be felt through the skin.
Spondylolisthesis:
A forward slippage of one vertebra on the other.
Spondylolysis:
A stress fracture of the back of the spine. Occurs in the portion of the lamina known as the "pars interarticularis."
Spondylosis:
Degenerative changes of a section of the vertebra.
Stenosis:
Decreased space available for the nerves, usually due to arthritis.
Syringomyelia:
The presence of cavities in the spinal cord.
Syrinx:
A tubular, fluid-filled cavity in the spinal cord.
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