11. The foramen of Panizza connects the left and right aorta. 12. It has a conical boss on the parietal surrounding the pineal foramen . 13. This flap of tissue is called the valve of the foramen ovale. 14. The foramen magnum is much larger than the occipital condyle. 15. Ideally this debridement would terminate exactly at the apical foramen . 16. This anatomical variant is known as an arcuate foramen . 17. Jacob Winslow is credited with first documenting the existence of the foramen spinosum. 18. The zygomatic nerve passes through the zygomatic-orbital foramen on this surface. 19. Most infections spread through the apical foramen from the pulp to periapical tissue. 20. Also an inferior petrosal sinus enters the sigmoid sinus near the jugular foramen .
