Superior Articular Process Of The Cervical Vertebra, Anatomy

Description

Processus articularis superior of a typical cervical vertebra occupies the posterolateral corner of the vertebral arch, rising superiorly from the junction of pedicle and lamina. Its facies articularis superior is shown as an oval, slightly concave facet oriented posterosuperiorly, positioned to meet the inferior articular facet of the vertebra above to form the cranial half of the zygapophysial (facet) joint. Medial to the facet lies the base of the lamina approaching the spinous process, while laterally the process aligns toward the transverse process region, defining the lateral boundary of the vertebral canal at that segment. Bone relief around the articular pillar is included. No cartilage is present. Facet orientation in the cervical spine governs coupled rotation and lateral flexion, and this single surface is where degenerative change, osteophyte formation, and capsular thickening contribute to cervical spondylosis and facet-mediated neck pain. Clinicians target the medial branches of the dorsal rami that innervate these joints, so a close, isolated view of the superior articular process helps clarify why medial branch blocks and radiofrequency neurotomy are planned relative to the articular pillar rather than the spinous process. Small differences in facet plane between upper and lower cervical levels also matter in whiplash-associated injury patterns and in understanding why C5 to C7 segments often become symptomatic. Orientation is the story. Use this illustration in gross anatomy and musculoskeletal modules when teaching the vertebral arch and zygapophysial joints, and in spine surgery or pain medicine publications discussing posterior element landmarks for facet injections or medial branch procedures. Anatomical accuracy verified by SciePro's Medical Advisory Board.