Inferior Vertebral Notch Of Axis Bone, Inferior View

Description

Inferior vertebral notch of the axis (C2) is highlighted along the inferior margin of the C2 pedicle, where the bony concavity lies anterolateral to the lamina and posterolateral to the vertebral body. From this inferior perspective, the posterior arch elements dominate the frame, with the paired laminae converging medially toward the bifid spinous process and enclosing the posterior portion of the vertebral foramen (neural canal). Lateral to the notch, the inferior articular processes and their facets are visible as load-bearing surfaces that will meet the superior articular facets of C3, while the transverse processes sit farther laterally as the gateway region for the transverse foramen. That inferior notch matters because it contributes to the intervertebral foramen at C2 to C3, the osseous corridor for the exiting C3 spinal nerve and accompanying radicular vessels. Foraminal stenosis from degenerative hypertrophy at the facet joint, osteophytes at the uncovertebral region, or post-traumatic deformity after a hangman fracture pattern can narrow this passage and produce C3 radiculopathy, often presenting as upper neck and occipital pain. Seeing the notch from below clarifies how close the nerve’s bony boundaries lie to the pars interarticularis and pedicle, a relationship that also guides C2 pedicle or pars screw trajectories and helps explain why small errors can violate the canal. Use this illustration for cervical spine anatomy labs, neurosurgical and orthopedic teaching on C2 instrumentation, or textbook figures on intervertebral foramina and cervical radiculopathy. It also fits radiology education when correlating inferior bony landmarks with CT assessment of foraminal narrowing at C2 to C3. Anatomical accuracy verified by SciePro's Medical Advisory Board.