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 three and ten years of age.

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