What muscles are innervated by the glossopharyngeal nerve

The axons that belong to the glossopharyngeal nerve provide motor innervation to the stylopharyngeus muscle and the superior pharyngeal constrictor muscle.

What does glossopharyngeal nerve control?

There are a number of functions of the glossopharyngeal nerve. It controls muscles in the oral cavity and upper throat, as well as part of the sense of taste and the production of saliva. Along with taste, the glossopharyngeal nerve relays general sensations from the pharyngeal walls.

What is the function of the Glossopharyngeal IX?

The glossopharyngeal nerve (cranial nerve IX) is responsible for a number of sensory and motor functions associated with the tongue (glossa in Greek) and the pharynx, or throat.

What does the glossopharyngeal nerve stimulate?

The glossopharyngeal (9th) nerve primarily mediates sensation to the upper pharynx and taste to the posterior third of the tongue. The only muscle innervated by this nerve is the stylopharyngeus, which is not easily accessible for insertion of EMG recording electrodes. In 1992, Lanser, et al.

What muscles does the vagus nerve innervate?

Vagus nerveInnervatesLevator veli palatini, Salpingopharyngeus, Palatoglossus, Palatopharyngeus, Superior pharyngeal constrictor, Middle pharyngeal constrictor, Inferior pharyngeal constrictor, visceraIdentifiersLatinnervus vagusMeSHD014630

What Innervates tympanic nerve?

The tympanic nerve provides sensation to the middle ear (tympanic cavity). This includes the internal surface of the tympanic membrane. … The tympanic nerve also gives parasympathetic supply to the otic ganglion. These neurons then provide secretomotor innervation of the parotid gland via the auriculotemporal nerve.

What are the clinical manifestations of glossopharyngeal nerve palsy?

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.

What does the stylopharyngeus muscle do?

The stylopharyngeus muscle act as a significant dilating muscle of the nasopharynx. During breathing, the contraction of this muscle pulls the nasopharyngeal wall dorsally. This action prevents the dynamic collapse of the dorsal wall of the nasopharynx by supporting the wall during inspiration.

What nerve Innervates swallowing?

The coordinated swallowing movements involve the tongue, which is suspended on the hyoid apparatus and innervated by the hypoglossal nerve (XII), and the larynx and pharynx, which are primarily controlled by the nucleus ambiguus and nucleus solitarius in the caudal brainstem through the glossopharyngeal (IX), vagus (X) …

Which muscle does the accessory XI cranial nerve control?

The accessory nerve is a cranial nerve that supplies the sternocleidomastoid and trapezius muscles. It is considered as the eleventh of twelve pairs of cranial nerves, or simply cranial nerve XI, as part of it was formerly believed to originate in the brain.

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What is the major function of the glossopharyngeal nerve quizlet?

The glossopharyngeal nerve is cranial nerve IX. Its major motor function is to help in swallowing.

Which is a function of the Glossopharyngeal IX nerve quizlet?

It provides sensory information about taste, sensation to the tongue and pharynx and information from chemo/baro-receptors in the carotid artery.

What does phrenic nerve innervate?

The phrenic nerves provide motor innervation to the diaphragm and work in conjunction with secondary respiratory muscles (trapezius, pectoralis major, pectoralis minor, sternocleidomastoid, and intercostals) to allow respiration.

Is the Glossopharyngeal nerve sensory or motor?

The glossopharyngeal nerve is the 9th cranial nerve (CN IX). It is one of the four cranial nerves that has sensory, motor, and parasympathetic functions. It originates from the medulla oblongata and terminates in the pharynx.

What nerves innervate all muscles of soft palate?

The motor innervation for the muscles of the soft palate comes from the pharyngeal plexus derived from the vagus nerve (CN X). The only exception is the tensor veli palatini muscle which is supplied by the medial pterygoid nerve, a branch of the mandibular division of the trigeminal nerve.

Which cranial nerve receives sensory impulses from the face and Innervates muscles of mastication?

CNFunctionVII—facial nerve (facial expression)Provides motor innervation to the muscles of facial expression and the stapedius muscle; also transmits gustatory perception from the anterior two-thirds of the tongue; innervates all of the glands of the head, except the parotid gland

Which cranial nerve innervates the lateral rectus eye muscle that abducts the eye?

The extraocular muscles are innervated by lower motor neurons that form three cranial nerves: the abducens, the trochlear, and the oculomotor (Figure 20.3). The abducens nerve (cranial nerve VI) exits the brainstem from the pons-medullary junction and innervates the lateral rectus muscle.

How do you assess the Glossopharyngeal nerve?

Ask the patient to cough (assessing CN X)
Ask the patient to open the mouth wide and say ‘ah’, using a tongue depressor to visual the palate and posterior pharyngeal wall (assessing CN IX and X) The soft palate should move upwards centrally.

Is tympanic nerve a branch of Glossopharyngeal?

Jacobson nerve is the eponymous name of the tympanic branch of the glossopharyngeal nerve (CN IX) and arises from the inferior ganglion of the glossopharyngeal nerve. It also carries preganglionic parasympathetic fibers, from the inferior salivary nucleus, which eventually enter the otic ganglion.

What is tympanic plexus?

The tympanic plexus is a nerve plexus that is located on the cochlear promontory.

What is Jacobson nerve?

Jacobson’s nerve is a tympanic branch of the glossopharyngeal nerve, arising from its inferior ganglion. It enters the middle ear cavity through the inferior tympanic canaliculus, runs in a canal on the cochlear promontory and provides the main sensory innervation to the mucosa of the mesotympanum and Eustachian tube.

What muscles are responsible for swallowing?

These muscles include the omohyoid, sternohyoid, and sternothyroid muscles (ansa cervicalis), and the thyrohyoid muscle (CN XII). [17] The longitudinal pharyngeal muscles function to condense and expand the pharynx as well as help elevate the pharynx and larynx during swallowing.

What cranial nerve is Glossopharyngeal?

The glossopharyngeal nerve is the 9th cranial nerve (CN IX). It is one of the four cranial nerves that has sensory, motor, and parasympathetic functions. It originates from the medulla oblongata and terminates in the pharynx.

What muscles are involved in swallowing quizlet?

Suprahyoid Muscles. – Muscles that help form floor of oral cavity, anchor tongue, elevate hyoid, and move larynx superiorly during swallowing. …
Digastric. …
Stylohyoid. …
Mylohyoid. …
Geniohyoid. …
Infrahyoid muscles. …
Sternohyoid. …
Sternothyroid.

What is Palatoglossus innervated by?

Palatoglossus is the only tongue muscle derived from the fourth branchial arch. … This is the reason that all the other tongue muscles receive innervation from the twelfth cranial nerve (hypoglossal nerve) except the palatoglossus muscle, which is innervated by the tenth cranial nerve (vagus nerve).

What is the nerve supply of Stylopharyngeus?

The stylopharyngeus is the only muscle in the pharynx innervated by the glossopharyngeal nerve (CN IX) via branchial motor neurons with their cell bodies in the rostral part of the nucleus ambiguus.

Is Stylopharyngeus skeletal muscle?

The glossopharyngeal nerve provides motor innervation to the stylopharyngeus muscle. This cranial nerve has mostly sensory fibers, but provides motor innervation to one skeletal muscle, the stylopharygeus muscle.

Which of the cranial nerves Innervates the trapezius and sternocleidomastoid muscles?

The muscles innervated directly by the XI nerve are the trapezius and the sternocleidomastoid, in addition to the laryngeal musculature (in collaboration with the vagus nerve), such as the palatal, pharyngeal, laryngeal muscles.

What is innervated by accessory nerve?

Function of the accessory nerve The spinal accessory nerve is a purely motor entity. It innervates both the trapezius and the sternocleidomastoid muscles.