What nerve is the tongue innervated by?

What nerve is the tongue innervated by?

hypoglossal nerve
The muscles of the tongue predominantly derive from myoblasts that originate in occipital somites and thus are innervated by the hypoglossal nerve (CN XII).

What nerve is responsible for the tongue?

Hypoglossal Nerve
The Hypoglossal Nerve is the 12th Cranial Nerve (Cranial Nerve XII). It is mainly an efferent nerve for the tongue musculature. The nerve originates from the medulla and travels caudally and dorsally to the tongue.

What four cranial nerves innervate the tongue and what are their functions?

They are: the genioglossus, hyoglossus, styloglossus and the palatoglossus muscles. All the muscles of the tongue are innervated by the hypoglossal nerve (CN XII), except for the palatoglossus muscle which is supplied by the vagus nerve (CN X).

Which muscle is innervated by the XII hypoglossal nerve?

The hypoglossal nerve (CN XII) is exclusively a motor nerve carrying general somatic efferent fibers (GSE). It innervates all intrinsic and almost all extrinsic muscles of the tongue, as well as one suprahyoid muscle, the geniohyoid muscle.

Does the vagus nerve innervate the tongue?

Innervation. All of the muscles of the tongue, intrinsic and extrinsic, are innervated by the hypoglossal nerve (CN XII). The one exception is the palatoglossus muscle which is supplied by the vagus nerve (CN X).

Which nerve Innervates the posterior 1/3 of the tongue?

Glossopharyngeal nerve
Sensory supply Posterior one-third: Glossopharyngeal nerve (cranial nerve IX), plus a small branch of the internal laryngeal nerve (branch of the vagus nerve, cranial nerve X). Taste sensation is carried by special sensory nerve fibres of the chorda tympani (branch of the facial nerve).

How many cranial nerves supply the tongue?

Sensory supply Anterior two-thirds: Lingual nerve (a branch of the mandibular division of the trigeminal nerve – V3) Posterior one-third: Glossopharyngeal nerve (cranial nerve IX), plus a small branch of the internal laryngeal nerve (branch of the vagus nerve, cranial nerve X).

Does facial nerve innervate tongue?

The facial nerve provides motor innervation of facial muscles that are responsible for facial expression, parasympathetic innervation of the glands of the oral cavity and the lacrimal gland, and sensory innervation of the anterior two-thirds of the tongue.

Which is a function of the hypoglossal XII nerve?

The hypoglossal nerve enables tongue movement. It controls the hyoglossus, intrinsic, genioglossus and styloglossus muscles. These muscles help you speak, swallow and move substances around in your mouth.

What does the vagus nerve innervate?

Functions. The vagus nerve has a very extensive distribution. Sensory: Innervates the skin of the external acoustic meatus and the internal surfaces of the laryngopharynx and larynx. Provides visceral sensation to the heart and abdominal viscera.

Which cranial nerve innervates the anterior 2/3 of the tongue?

Hypoglossal nerve Synonyms: Cranial nerve XII, CN XII , show more… The hypoglossal nerve (CN IX) innervates all the tongue muscles except for the palatoglossus. This nerve exits the skull through the hypoglossal canal, and courses straight downward to the point just below the angle of the mandible.