Inferior Vertebral Notch Of The Lumbar Vertebra, Lateral View

Description

Inferior vertebral notch (incisura vertebralis inferior) on a lumbar vertebra is highlighted in lateral profile, carved into the inferior border of the pedicle between the vertebral body anteriorly and the superior articular process posteriorly. The pedicle projects posteriorly from the body, and the notch forms a concave indentation along its caudal margin, complementary to the superior vertebral notch (incisura vertebralis superior) above. Together, the opposing notches of adjacent vertebrae outline the osseous boundary of the intervertebral foramen, with the vertebral body and intervertebral disc positioned anterior to the foramen and the zygapophysial (facet) joint complex positioned posterior to it. Bone contours are the focus. This particular bony recess matters because small changes in pedicle morphology and facet hypertrophy can narrow the intervertebral foramen and compress the exiting lumbar spinal nerve, a common mechanism in foraminal stenosis causing radicular pain in the lower back and leg. The lateral perspective makes the notch’s relationship to the pedicle and superior articular process easy to read, which helps when teaching why degenerative spondylosis or loss of disc height shifts load posteriorly and reduces foraminal area. It also supports procedural planning, since the pedicle’s superior and inferior margins frame the corridor used for pedicle screw trajectories and for fluoroscopic interpretation of the “pedicle shadow.” Use this illustration in gross anatomy and musculoskeletal modules to explain how adjacent vertebrae form the intervertebral foramen, and in spine surgery or interventional pain publications discussing foraminal stenosis, transforaminal epidural access, or pedicle-based fixation landmarks at L1 to L5. It also fits radiology education when correlating lateral bony anatomy with CT reconstructions of the lumbar spine. Anatomical accuracy verified by SciePro's Medical Advisory Board.