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Foramen cecum of frontal bone

Recommended video: Cranial fossae [11:38]
Structures of the cranial fossae.

The foramen cecum is a small midline opening in the anterior cranial fossa, between the frontal and ethmoid bones. It is located at the base of the frontal crest, a midline bony ridge of the frontal bone, and just anterior to the crista galli, a thick, bony midline projection from the ethmoid bone.

The foramen cecum serves as a passageway for a dural diverticulum during fetal development, which typically involutes postnatally, leaving a blind-ended depression. In about 1% of adults, however, the foramen cecum remains patent and may transmit a nasal (frontal) emissary vein that connects the veins of the nasal cavities with the superior sagittal sinus.

Terminology English: Foramen cecum

Foramen caecum
Definition Midline aperture between the crista galli and frontal bone
Function Transmits emissary veins to nasal cavity

Learn more about the foramen cecum in the following study unit:

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