Anterior Cranial Fossa
The anterior cranial fossa is shaded in yellow.
The cranial cavity is divided into three fossae:
The anterior cranial cavity is formed from the following bones:
- Frontal bone (orbital plate)
- Ethmoid bone (cribriform plate)
- Sphenoid bone (body and lesser wings)
The anterior cranial cavity contains the frontal lobes of the brain.
Structures in the anterior cranial cavity include:
- Frontal crest – site of attachment for falx cerebri
- Foramen caecum – emissary veins from nasal cavity to superior sagittal sinus
- Crista Galli – site of attachment for falx cerebri
- Cribriform plate of the ethmoid bone – small foramina through which olfactory nerves pass through
- Anterior clinoid process – medial parts of lesser wings of sphenoid bone, act as anterior site of attachment for tentorium cerebelli.
- Optic canal – optic nerve and ophthalmic artery pass through
In the midline, the anterior cranial fossa meets the middle cranial fossa at the anterior border of the chiasmatic sulcus
. Laterally, the lesser wings of the sphenoid provided the boundary between the anterior and middle cranial fossae.