Test space for STL models of the lumbar spine in any of five motion end-positions: Flexion/Extension/Neutral/Right Lateral Bending/Right Axial Rotation. This is a set of Lumbar Spine vertebrae models in STL format corresponding to one of five spinal positions: Neutral, Flexion, Extension, Right Axial Rotation and Right Lateral Bending. Please refer to the Collection properties for details on nomenclature and specimen numbers.