What Innervates the posterior tongue?

What Innervates the posterior 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).

How many nerve supply the tongue?

Overall, the XII nerve in adult humans gave off approximately 50–60 primary nerve branches along its whole length within the tongue. In general, the XII branched in the following order from the root to the apex of the tongue: GH, SL, SG, HG, l-IL, horizontal GG, oblique GG, posterior T/V, m-IL, and anterior T/V (Figs.

What does glossopharyngeal nerve innervate?

As stated above, the glossopharyngeal nerve provides motor innervation to the stylopharyngeus muscle, which is responsible for elevating the pharynx and larynx.

What Innervates anterior tongue?

The buds on the anterior two-thirds of the tongue and the soft palate are innervated by the chorda tympani, a branch of the facial nerve (CN VII). Those within the posterior one-third of the tongue (including all vallate papillae) and the pharynx are innervated by the glossopharyngeal nerve (CN IX).

What does Glossopharyngeal nerve innervate?

What are muscle Innervations?

The word innervate sounds like what it is — it means to “put the nerves into” something. When nerves go into muscle fiber, they innervate the muscle fiber. Innervate is to supply nerves to something, but it can also mean to energize. Think of all the energy you have when you get nervous!

What is the dirty mnemonic for cranial nerves?

Remembering cranial nerve names in order of CN I to CN XII: On old Olympus’s towering top a Finn and German viewed some hops. Ooh, ooh, ooh to touch and feel very good velvet.

What does the glossopharyngeal nerve do for the tongue?

Part of the tongue: The glossopharyngeal nerve helps you taste food in the back third of your tongue. Stylopharyngeus muscle: A long muscle that runs down part of your throat. CN IX connects to this muscle to lift the voice box (larynx) and nearby throat (pharynx). This makes it possible to swallow.

What nerve controls taste of the anterior 2/3 of the tongue?

chorda tympani nerve
The branch of the facial nerve that innervates the anterior two-thirds of the tongue is the chorda tympani nerve.

What does the 3rd cranial nerve innervate?

The autonomic nervous system supplies (innervates) organs, like your eyes. The oculomotor nerve is the third cranial nerve (CN III). It allows movement of the eye muscles, constriction of the pupil, focusing the eyes and the position of the upper eyelid.

What is the acronym for the 12 cranial nerves?

I-Olfactory II-Optic III-Oculomotor IV-Trochlear V-Trigeminal VI-Abducens VII-Facial VIII-Acoustic (Vestibulocochlear) IX-Glossophrayngeal X-Vagus XI-Spinal Accessory XII-Hypoglossal “OOOTTAFAGVSH” [On Old Olympus Towering Tops, A Finn And German Viewed Some Hops] or [Oh, oh, oh, to touch and feel very good velvet…ah …

What does CN 9 innervate?

Parasympathetic Functions The glossopharyngeal nerve provides parasympathetic innervation to the parotid gland. These fibres originate in the inferior salivatory nucleus of CN IX. These fibres travel with the tympanic nerve to the middle ear.

What happens when the glossopharyngeal nerve is damaged?

Glossopharyngeal nerve lesions produce difficulty swallowing; impairment of taste over the posterior one-third of the tongue and palate; impaired sensation over the posterior one-third of the tongue, palate, and pharynx; an absent gag reflex; and dysfunction of the parotid gland.

Does 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).