Posterior longitudinal ligament
Joints and ligaments · Latin: Ligamentum longitudinale posterius
The posterior longitudinal ligament is a ligament connecting the posterior surfaces of the vertebral bodies of all of the vertebrae.
It weakly prevents hyperflexion of the vertebral column.
It also prevents posterior spinal disc herniation, although problems with the ligament can cause it.
Definition from Wikipedia, CC BY-SA 4.0.