| Ligament | Stiffness (N/mm) |
| anterior longitudinal ligament | 8.74 |
| posterior longitudinal ligament | 5.83 |
| ligamentum flavum | 15.38 |
| intertransverse ligament | 0.19 |
| interspinal ligament | 10.85 |
| supraspinal ligament | 2.39 |