Anatomy Exam Cranial Nerves and Foramina 2

Question 1

Which foramen transmits the facial nerve (CN VII) as it exits the skull?

Accepted Answer

Stylomastoid foramen

Answer

The facial nerve exits the skull through the stylomastoid foramen before branching in the parotid gland.

Question 2

A patient cannot move their eyes upward or medially and has a dilated, non-reactive pupil. Which cranial nerve is most likely damaged?

Accepted Answer

CN III (Oculomotor)

Answer

CN III controls most extraocular muscles and carries parasympathetic fibers to the pupillary sphincter; its injury causes the classic 'down and out' eye with mydriasis.

Question 3

The lesser petrosal nerve (parasympathetic to the parotid gland) exits the skull through which foramen?

Accepted Answer

Foramen ovale

Answer

The lesser petrosal nerve, carrying GVE fibers from CN IX, exits through the foramen ovale (or a small canal nearby) to reach the otic ganglion.

Question 4

Which cranial nerve carries taste sensation from the anterior two-thirds of the tongue?

Accepted Answer

CN VII (Facial)

Answer

The chorda tympani branch of CN VII carries special visceral afferent (taste) fibers from the anterior two-thirds of the tongue.

Question 5

Which structure passes through the foramen lacerum in life?

Accepted Answer

Only the cartilaginous plug (nothing functional)

Answer

The foramen lacerum is filled with fibrocartilage in living individuals; the internal carotid artery passes over (not through) it via the carotid canal.

Anatomy Exam Practice Test

Anatomy Exam Practice Test

Anatomy Exam Cranial Nerves and Foramina 2