Questions: Multiple Select Question Select all that apply Choose all the cranial nerves in which parasympathetic fibers leave the brainstem through. vi VII IX IV III x

Multiple Select Question
Select all that apply
Choose all the cranial nerves in which parasympathetic fibers leave the brainstem through.
vi
VII
IX
IV
III
x

Transcript text: Multiple Select Question Select all that apply Choose all the cranial nerves in which parasympathetic fibers leave the brainstem through. vi VII IX IV III $x$

Solution

The cranial nerves through which parasympathetic fibers leave the brainstem are:

III (Oculomotor nerve)
VII (Facial nerve)
IX (Glossopharyngeal nerve)

Explanation for each option:

III (Oculomotor nerve): Correct. The oculomotor nerve carries parasympathetic fibers that control the constriction of the pupil and the shape of the lens in the eye.
VII (Facial nerve): Correct. The facial nerve carries parasympathetic fibers that stimulate the lacrimal glands (for tear production) and salivary glands (submandibular and sublingual glands).
IX (Glossopharyngeal nerve): Correct. The glossopharyngeal nerve carries parasympathetic fibers that innervate the parotid salivary gland.
VI (Abducens nerve): Incorrect. The abducens nerve is primarily a motor nerve that controls the lateral rectus muscle of the eye and does not carry parasympathetic fibers.
IV (Trochlear nerve): Incorrect. The trochlear nerve is a motor nerve that controls the superior oblique muscle of the eye and does not carry parasympathetic fibers.