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JACOBS LOCKING HOOK – Thick, threaded rods for fixation of various spinal deformities.
JARCHO-LEVIN SYNDROME – Extensive defects of the spine with associated defects in the ribs leading to a small, stiff thorax and pulmonary compromise.
JOINT – The junction or articulation of two or more bones that permits varying degrees of motion between the bones.
JOINTS of LUSCHKA (uncovertebral joints) – Unique to the cervical spine, these jointlike structures are formed by the apposition of posterolateral portions of adjacent vertebral bodies; forms the anterior portion of the canal where nerves pass through.
JUGULAR VEIN – The major vein on each side of the neck draining blood from the head towards the heart. Large obvious vein in the neck.
JUVENILE RHEUMATOID ARTHRITIS – generalized inflammatory joint disease in children.
JUVENILE SCOLIOSIS – Begins between the ages of 3 and 10 years of age.