Facet Injection Procedure Of The Lumbar Spine

Description

Sequentially animated lumbar vertebrae frame the paired zygapophysial (facet) joints as the needle advances toward the target articulation, typically at L3 to L4, L4 to L5, or L5 to S1. The superior articular process of the caudal vertebra sits posterolateral to the vertebral body, meeting the inferior articular process above to form the synovial joint space and capsule. Layer by layer, the needle trajectory is oriented from posterior to anterior through skin and subcutaneous tissue toward the facet line, with the lamina and spinous process remaining medial landmarks and the transverse process more lateral. Motion cues emphasize depth, angulation, and final needle tip placement along the joint recess or periarticular capsule. Lumbar facet injections are used diagnostically to confirm facet-mediated low back pain and therapeutically to deliver local anesthetic with or without corticosteroid, often when axial pain worsens with extension and rotation. The animation clarifies why small changes in obliquity and cranial-caudal tilt affect access to the joint, and how bony architecture guides safe placement while avoiding an overly medial path toward the spinal canal. This is where technique matters. Use it in pain medicine and anesthesiology teaching modules on medial branch blocks versus intra-articular facet injections, in radiology or PM&R lectures on fluoroscopic anatomy of the lumbar posterior elements, or in patient-facing procedural counseling that benefits from a stepwise depiction of needle advancement and target confirmation. Anatomical accuracy verified by SciePro's Medical Advisory Board.