Multiple choice

The largest cranial nerve in human being is

  1. optic

  2. facial

  3. trigeminal

  4. mandibular
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The trigeminal nerve (CN V) is the largest cranial nerve by diameter and root size. It has three major divisions: ophthalmic, maxillary, and mandibular, supplying sensation to most of the face and motor function to muscles of mastication. Optic (CN II) is actually the largest by NUMBER of axons (over 1 million), but trigeminal is largest by physical size.

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