Cranial fossa

Cranial fossa
Cranial fossa
	Three cranial fossae and its boundaries.; Purple: Anterior cranial fossa Blue: Middle cranial fossa Green: Posterior cranial fossa Boundaries; 1: Sphenoidal limbus (anterior margin of the chiasmatic groove); 2: Posterior borders of the lesser wings of the sphenoid; 3: Dorsum sellae of the sphenoid bone; 4: Superior borders of the petrous part of the temporal bone; 5: Groove for transverse sinus of the occipital bone
Identifiers
FMA	321144
	Anatomical terminology

A cranial fossa is formed by the floor of the cranial cavity.

There are three distinct cranial fossae:

Anterior cranial fossa (fossa cranii anterior), housing the projecting frontal lobes of the brain
Middle cranial fossa (fossa cranii media), separated from the posterior fossa by the clivus and the petrous crest housing the temporal lobe
Posterior cranial fossa (fossa cranii posterior), between the foramen magnum and tentorium cerebelli, containing the brainstem and cerebellum

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