Osteology: Cranial Fossae Flashcards
anterior cranial fossa
frontal bone
ethmoid bone
lesser wing of sphenoid
middle cranial fossa
greater wing of sphenoid
orbital canals, etc.
petrous portion of temporal bone
parietal bone?
posterior cranial fossa
internal auditory meatus, etc.
occipital bone
partietal bone?
foramen cecum
in the frontal bone!
articulates with the ethmoid bone
emissary v. travels though
crista galli
attachment of falx cerebri
point in ethmoid bone
cribiform plate
holes in ethmoid bone
CN I olfactory
anterior ethmoid n, a, v
lesser wing of sphenoid bone
the pointy part; the border of the anterior cranial fossa
greater wing of sphenoid bone
where all the holes are in the middle cranial fossa
superior orbital fissure
CN III, IV, V1, VI and opthalmic vv travel though
optic canal
CN II and opthalmic a. travel though
chiasmatic groove
where optic chiasm occures
sella turcica
holds pituitary gland (diaphragma sellae covers it)
ant, middle, posterior clinoid processes
attachment of tintorium cerebelli
foramen rotundum
V2 travels through
foramen ovale
V3 travels through
foramen spinosum
middle meningeal a., recurrent meningeal br. of V3 (?)
foramen lacerum
closed by cartilage in life
greater petrosal nerve crosses over it
carotid groove
for internal carotid groove in cavernous sinus
hiatus of facial canal
for greater petrosal nerve from CN 7
petrous portion of temporal bone
the hard “rocky” part
arcuate eminence
small bump in petrous portion of temporal bone caused by the arch of the superior semicircular canal of the ear
internal auditory meatus
transmits CN 7, 8, and auditory branch of basilar artery
jugular foramen
CN 9, 10, 11
hypoglossal canal
CN 12
foramen magnum
transmits spinal cord, CN 11, and vertebral a.
internal occipital protuberance
site of confluens of sinuses
