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Cranial Base (has two surfaces (External surface (inferior aspect of the…
Cranial Base
has two surfaces
External surface
inferior aspect of the skull
Internal Surface (Endocranial)
has 3 fossae
Posterior cranial fossa
Middle cranial fossa
Anterior cranial fossa
anteriorly
inner surface of frantal bone
contain the foramen cecum
Anteriolaterally
orbital plates of ethmoid bone
Centrally
Cribriform plate of ethmoid
roof of nasal cavity
perforated by lots of foramens allowing olfactory nerves (coming from olfactory bulb)to enter the roof of the nasal cavity
Crista galli is a projection in the middle of cribriform plate, meninges (membrane covers the brain) are attached to it
Posteriorly
lesser wings of sphenoid
has sharp margins
Anterior cranial fossa contains the frontal lobes of brain