The hypoglossal nerve (CN XII) is the cranial nerve that innervates intrinsic and extrinsic tongue muscles.
Except for the palatoglossus muscle, which is usually affected by the vagus nerve (CN X). the hypoglossal nerve (CN XII) innervates all of the intrinsic and extrinsic muscles of the tongue.
The 12th Cranial Nerve is the Hypoglossal Nerve (Cranial Nerve XII). It primarily serves as an efferent nerve for the tongue musculature. The medulla nerve gives rise to the nerve, which travels cranially and dorsally to the tongue.
The hypoglossal nerve helps to control the muscles that keeps moving the tongue, allowing you to: Make clicking sounds with your mouth. Move things around within your mouth.
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