Uncovertebral Joints of Luschka

articulationes uncovertebrates Luschkae

The uncovertebral joints of Luschka (neurocentral joints) are the pseudojoints formed between the uncinate processes (lateral lips) of C3-C7 vertebral bodies and the bevelled lateral margin of the vertebral body above. They are not true joints at birth but develop between the ages of 9-14 as the uncinate process grows and the lateral disc degenerates, creating a joint-like cleft filled with synovial-like fluid. They border the posterolateral disc space and form the anteromedial wall of the neural foramen.

Region: Neck

Clinical Relevance

Clinical Notes

Uncovertebral joint osteophytes (uncinate osteophytes) are the most common cause of cervical radiculopathy, impinging on the exiting nerve root in the neural foramen from the anteromedial direction. ACDF surgery for cervical radiculopathy includes uncinectomy (removing the uncinate osteophyte with a Kerrison rongeur) to decompress the foramen laterally. The Luschka joints also limit excessive lateral bending and contribute to the coupled motion of cervical lateral bending and rotation.

Pathology

Common Injuries & Conditions

Uncovertebral Osteophyte Compressing Cervical Nerve Root

Degenerative uncinate osteophyte growing posterolaterally from the Luschka joint directly compresses the exiting cervical nerve root in the neural foramen, producing dermatomal arm pain reproduced by neck extension and rotation; ACDF with uncinectomy removes the osteophyte under microscopic magnification from the anterior approach.