☆ The ponticulus posticus means "little posterior bridge" in Latin.
☆ It was defined as an abnormal small bony bridge formed between the posterior portion of the superior articular process and the posterolateral portion of the superior margin of the posterior arch of the atlas.
☆ It has a variable morphology, can be complete or incomplete and may be unilateral or bilateral.
☆ Literature reveals a higher incidence in females compared with males and this anomaly was age independent.
☆ The sulcus situated on the posterolateral margin of the atlas forms a groove for the vertebral artery. The vertebral artery (atlantic portion V3 ) passes through this foramen.