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 Fluid
The clear fluid which surrounds the spinal cord and nerves in the spine.
Spinal Cord
The connection between the brain stem and the nerves which allows motion and sensation.
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.