Which of the following is the largest cranial nerve?
cranial nerves, dental hygiene exam prep

Which of the following is the largest cranial nerve?

Which of the following is the largest cranial nerve?

(A). First
(B). Seventh
(C). Sixth
(D). Fifth

cranial nerves, dental hygiene exam prep

Answer: (D). Fifth

There are 12 cranial nerves: olfactory (I), optic (II), oculomotor (III), trochlear (IV), trigeminal (V), abducens (VI), facial (VII), vestibulochlear (VIII), glossopharyngeal (IX), vagus (X), accessory (XI), hypoglossal (XII).

Among all of those, the trigeminal (V, fifth) is the largest cranial nerve. It is a mixed nerve, with both sensory and motor components. It has ophthalmic, maxillary, and mandibular branches. It provides sensation to the oral cavity, and the muscle of mastication.

Facial nerve is the seventh (VII) cranial nerve. It is a motor and sensory nerve, and supply the muscles of facial expressions.

Abducent is the sixth (VI) cranial nerve. It is a motor nerve and moves the lateral muscle of the eyeballs. 

Olfactory is the first (I) cranial nerve. It is a sensory nerve and carries odor from the nose to the brain.

cranial nerves, dental hygiene exam prep

Are you logged in with the PAID National Boards Review Package? If yes, you can click HERE and read MORE about the 12 cranial nerves. (Link only works for PAID members, sorry!)

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Written by
Claire Jeong, RDH, MS
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