Cranial Fossae

Question 1

the olfactory nerve exits the cranial cauls via what opening?

Answer 1

cribriform plate of the ethmoid bone

Question 2

what are the contents of the optic canal?

Answer 2

the optic nerve and the ophthalmic artery

Question 3

what are the contents of the superior orbital fissure?

Answer 3

the ophthalmic veins, the oculomotor nerve, the trochlear nerve, the ophthalmic division of the trigeminal nerve, and the abducent nerve.

Question 4

what are the contents of the foramen rotundum?

Answer 4

the maxillary division of the trigeminal nerve (cranial nerve Vb)

Question 5

what are the contents of the foramen ovale?

Answer 5

the mandibular division of the trigeminal nerve (Vc) and the lesser petrosal branch of the glossopharyngeal nerve

Question 6

what are the contents of the foramen spinosum?

Answer 6

the nervus spinosus from the mandibular division of the trigeiminal nerve and middle meningeal artery.

Question 7

what are the contents of the internal acoustic meatus?

Answer 7

cranial nerves VII (facial nerve) and VIII (vestibulocochlear/auditory nerve) the nervus intermedius/ nerve of Wrisberg/sensory root of VII and the motor root of VII, the vestibular and cochlear roots of VII and the internal auditory/internal labyrinthine artery and vein

Question 8

what are the contents of the jugular foramen?

Answer 8

the jugular bulb, the inferior petrosal sinus, the tympanic body/ tympanic gloms or jugular body/jugular gloms, cranial nerves IX (glossopharyngeal), X (vagus) and XI (spinal accessory)

Question 9

What forms the roof of the posterior cranial fossa?

Answer 9

tentorium cerebelli

Question 10

What part of the cerebrum occupies the posterior cranial fossa?

Answer 10

none;

the tentorium cerebelli separates the cerebrum into a space above the posterior cranial fossa

Question 11

What part of the central nerve system occupies the posterior cranial fossa

Answer 11

the cerebellum, pons, and medulla oblongata