The Anatomy Of The Pedicle Of The Lumbar Vertebra

Description

Beginning at the anterior vertebral body, the animation tracks posteriorly into the lumbar pedicle, the short, thick osseous bridge forming the lateral wall of the vertebral canal before blending into the laminae of the vertebral arch. As the camera advances, the superior and inferior vertebral notches on the pedicle margins resolve into the intervertebral foramen, bounded with the adjacent vertebra by its opposing pedicle. Spinous and transverse processes come into orientation as landmarks, with the pedicle positioned medial to the transverse process base and lateral to the canal. Motion clarifies the pedicle’s three-dimensional cylinder-like geometry and its relationship to the central canal. Pedicle anatomy matters most when you are planning or teaching posterior lumbar instrumentation, where pedicle screw trajectory must respect the medial wall adjacent to the dural sac and the inferior border contributing to the exiting nerve root corridor. Breach patterns are not abstract: a medial violation risks canal compromise, while an inferior or lateral breach can endanger the nerve root within the foramen, and pedicle morphology varies by level from L1 through L5 in predictable ways that influence screw diameter and angulation. Sequential rotation and progressive emphasis on borders make the notches, foraminal boundaries, and canal adjacency easier to understand than any single still view. Small margins. Real consequences. Use this animation in spine anatomy and orthopaedic or neurosurgical teaching modules, in radiology correlation for CT-based pedicle assessment, or in publisher content explaining pedicle screw fixation, spondylolysis versus pedicle stress injury, and foraminal stenosis mechanics in the lower back. Anatomical accuracy verified by SciePro's Medical Advisory Board.