The model illustrates degenerative changes to the vertebral bodies and intervertebral discs of the lumbar spine in various degrees. Based on the original cast of a human lumbar spine, even finest bone structures are accurately depicted. The following conditions are shown from top to bottom: Intervertebral disc in healthy condition, Lumbar vertebra (L1) without degenerative changes, Intervertebral disc with protrusion, Lumbar vertebra (L2) with beginning degenerative changes, Intervertebral disc with medial prolapse, Lumbar vertebra (L3) with advanced degenerative changes, Intervertebral disc with intraforaminal prolapse on the right, Lumbar vertebra (L4) with strong degenerative changes and bony constriction of the left intervertebral foramen, Extremely narrowed intervertebral disc, Lumbar vertebra (L5) with strong degenerative changes and bony constriction of the left intervertebral foramen with pressure on the spinal nerve root L5 on the left. The model can be disassembled into vertebrae and intervertebral discs. Supplied on base. NEW and exclusively with original 3B Scientific anatomy models - now enhanced with 3B Smart Anatomy. free access to 3B Smart Anatomy courses in the award-winning Complete Anatomy app, this includes 11 3B Smart Anatomy courses with 23 lectures and 117 different views of interactive virtual models, plus 39 quizzes. To unlock these benefits, simply scan the label and register your 3B Smart Anatomy model online. All 3B Smart Anatomy features are completely free of charge. "Virtual meets Reality" developed by 3B Scientific makes learning human anatomy even more effective across all media.