Which cranial nerve is XII?

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Multiple Choice

Which cranial nerve is XII?

Explanation:
Cranial nerves are labeled in order from I to XII using Roman numerals. The twelfth cranial nerve is the hypoglossal nerve. It is mainly a motor nerve that supplies the intrinsic tongue muscles and most of the extrinsic tongue muscles (genioglossus, hyoglossus, styloglossus), enabling tongue movements. Palatoglossus is an exception and is innervated by the vagus. The hypoglossal nerve exits the skull through the hypoglossal canal and originates from the medulla. With this understanding, you identify the nerve as the hypoglossal nerve.

Cranial nerves are labeled in order from I to XII using Roman numerals. The twelfth cranial nerve is the hypoglossal nerve. It is mainly a motor nerve that supplies the intrinsic tongue muscles and most of the extrinsic tongue muscles (genioglossus, hyoglossus, styloglossus), enabling tongue movements. Palatoglossus is an exception and is innervated by the vagus. The hypoglossal nerve exits the skull through the hypoglossal canal and originates from the medulla. With this understanding, you identify the nerve as the hypoglossal nerve.

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