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Sagittal alignment

Sagittal alignment describes the arrangement of the spine and pelvis viewed from the side. It...

Sagittal image

A sagittal image is obtained in a plane separating the right and left sides of...

Sagittal vertical axis

Measure of horizontal offset between a vertical line through C7 and a sacral landmark, used...

Saltatory conduction

Mode of action-potential propagation in a myelinated axon, with signal regeneration at the nodes of...

Scheuermann kyphosis

Structural deformity developing during growth, with wedge-shaped vertebrae and an increased, relatively rigid kyphotic curve.Lire...

Schmorl node

Extension of disc material through a vertebral endplate into the vertebral body, often found incidentally.Lire...

Sciatica

Pain radiating into the lower limb along a distribution compatible with sciatic nerve roots, often...

Sciatic nerve

Major lower-limb nerve arising from the lumbosacral plexus and supplying much of the leg and...

Scoliosis

Three-dimensional spinal deformity involving a sideways curve and vertebral rotation.Lire cette fiche en françaisIn this...

Septic facet joint arthritis

Infection of a vertebral facet joint that may spread into paraspinal tissues or the epidural...