Question

What are 3 cranial nerves on which NCS are performed:

a) Cranial nerves II, V, IX
b) Cranial nerves III, VI, X
c) Cranial nerves IV, VII, XI
d) Cranial nerves I, VIII, XII

Answer 1

The facial nerve (CN VII) is the cranial nerve that contains preganglionic parasympathetic fibers, responsible for various functions including facial expressions and taste sensation.

Step-by-step explanation:

Among the listed options, the facial nerve (CN VII) contains preganglionic parasympathetic fibers. Therefore, the correct answer to which of these cranial nerves contains preganglionic parasympathetic fibers is b) facial, CN VII. It manages functions such as controlling the muscles for facial expressions, providing taste sensations from the anterior two-thirds of the tongue, and conveying parasympathetic innervation to the lacrimal and submandibular glands. The optic nerve (CN II) is dedicated to vision and does not contain parasympathetic fibers.