From the side, a healthy spine makes a gentle S. Its four curves balance your weight and soak up shock. When a curve gets too deep or bends sideways, it gets a name. Compare them here.
Normal curves
side view
Spinal curvaturesnormal vs abnormal
Pick a spine
📷 Reference image
A real labeled figure to compare with the interactive above.
Spinal Curvatures — OpenStax, CC BY 3.0 (via Wikimedia Commons)
