Luschka's joints

In anatomy, Luschka's joints (also called uncovertebral joints, neurocentral joints) are formed between uncinate process or "uncus" below and uncovertebral articulation above. They are located in the cervical region of the vertebral column from C3 to C7. Two lips project upward from the superior surface of the vertebral body below, and one projects downward from the inferior surface of vertebral body above. These structures, which measure approximately 2 × 4 to 3 × 6 mm, are situated anteromedially to the mixed nerve root and posteromedially to the vertebral artery, vein, and sympathetic nerves as they pass through the vertebral foramen. They also contribute to the formation of the anterior wall of the intervertebral foramen. They allow for flexion and extension and limit lateral flexion in the cervical spine.