Skeleton Landmark Human Landmark You will find L4 at the level of the Iliac Crests Lumbar Spine Lumbosacral Junction
Remember the sacrum is like an inverted triangle. The base is the superior portion of the sacrum that will articulate with L5 and the apex is the inferior portion that will articulate with the coccyx. Pelvis and Sacrum Sacral Base
Skeleton Landmark Costo-rib, transverse-transverse process of respective thoracic vertebra Chest Wall and Back Costo-transverse Joints