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 is the glossopharyngeal nerve responsible for?
As stated above, the glossopharyngeal nerve provides motor innervation to the stylopharyngeus muscle, which is responsible for elevating the pharynx and larynx.
What does CN 9 do?
This component of CN IX carries general sensory information (pain, temperature, and touch) from the skin of the external ear, internal surface of the tympanic membrane, the walls of the upper pharynx, and the posterior one-third of the tongue, anterior surface of the epiglottis, vallecula.
What is Palatopharyngeus muscle?
The palatopharyngeus is a muscle of both the soft palate and the pharynx. Anteriorly, the muscle fibers are attached to the hard palate, and posterior fibers are attached to the palatine aponeurosis. The anterior portion of the muscle is separated by the levator veli palatini (LVP).What does Stylopharyngeus mean?
Stylopharyngeus is a paired muscle that participates in forming the lateral walls of the pharynx. … By elevating the pharynx and larynx, the muscle plays an important role in swallowing (deglutition) and speaking. All these actions are possible due to the innervation received from the glossopharyngeal nerve.
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.
Which 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.
What Innervates the Stylopharyngeus muscle?
All the muscles of the pharynx receive innervation from the tenth cranial nerve (vagus nerve) except the stylopharyngeus, which is innervated by the ninth cranial nerve (glossopharyngeal nerve).What is the Palatopharyngeus muscle innervated by?
A branch of the pharyngeal branch of the vagus nerve innervates this muscle. It acts to elevate the soft palate during swallowing and vocalization.
What is Palatopharyngeus innervated?Innervation. Palatopharyngeus muscle is innervated by branches of pharyngeal plexus, which in turn receives input from the vagus nerve (CN X).
Article first time published onWhat happens if the vagus nerve is damaged?
If the vagus nerve becomes damaged by physical trauma or the growth of a tumor, it may cause digestive symptoms, or hoarseness, paralysis of the vocal cords and slowed heart rate.
Where does the vagus nerve exit the skull?
Exit from the brain The vagus nerve exits from the medulla oblongata in the groove between the olive and the inferior cerebellar peduncle. It leaves the skull through the middle compartment of the jugular foramen, where it has upper and lower ganglionic swellings, which are the sensory ganglia of the nerve.
What are cranial nerves 9 and 10?
CRANIAL NERVE 9 (GLOSSOPHARYNGEAL) AND CRANIAL NERVE 10 (VAGUS) CNs 9 and 10 work together to supply the musculature of the pharynx (mostly supplied by CN 10) and transmit visceral afferent information from vascular baroreceptors, and each nerve also has additional individual functions listed below.
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.
What nerve Innervates the Stylohyoid?
Nerve supply derives from the second pharyngeal arches (facial nerve). It is the stylohyoid branch of the facial nerve (cranial nerve VII) that innervates this muscle. Sometimes, the nerve towards the posterior belly of the digastric (branch of the facial nerve) also gives a branch to the stylohyoid muscle.
What muscle elevates the tongue?
The styloglossus originates at the styloid process and blends into the fibers of the inferior longitudinal tongue muscles and the hyoglossus, and elevates and retracts the tongue posteriorly and superiorly. The genioglossus, hyoglossus, and styloglossus are all innervated by the hypoglossal nerve (CN XII).
Which of the following is the responsibility of the hypoglossal 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 is the vagus nerve responsible for quizlet?
The Vagus Nerve (CN X) Innervates the skin of the external acoustic meatus and tympanic membrane, plus the internal surfaces of the laryngopharynx and larynx. Provides visceral sensation to the heart and abdominal viscera. Also provides sensory fibers to the meninges.
Which is a function of the hypoglossal XII nerve quizlet?
CN XII is responsible for tongue movement. CN XI is responsible for neck and shoulder movement. CN IX is responsible for taste in the posterior two thirds of the tongue, pharyngeal sensation, and swallowing.
What does the motor portion of the glossopharyngeal nerve cranial nerve IX innervate quizlet?
Motor Nerve innervate stylopharyngeal muscle of the pharynx for swallowing.
Which cranial nerve is associated with eye movement?
The oculomotor nerve is the third cranial nerve. It controls four of the six muscles that enable eye movement. Conditions affecting cranial nerve III include third nerve palsy.
Which type of basic reflex includes the pupillary response and accommodation?
The accommodation reflex (or near response) is a three-part reflex that brings near objects into focus through lens thickening, pupillary constriction, and inward rotation of the eyes—eye convergence.
What nerve goes between Palatoglossus and palatopharyngeus?
Palatopharyngeus muscleOriginPalatine aponeurosis and hard palateInsertionUpper border of thyroid cartilage (blends with constrictor fibers)ArteryFacial arteryNervePharyngeal branch of vagus nerve
What Innervates the hard palate?
The greater palatine and nasopalatine nerves both branches of the maxillary nerve innervate the hard palate, whereas the lesser palatine branch of the maxillary nerve supplies the soft palate. The buccal nerve, also a branch of the mandibular division of the trigeminal nerve innervates the cheek.
Why Stylopharyngeus is supplied by Glossopharyngeal nerve?
The stylopharyngeus muscle of the pharynx is innervated by the glossopharyngeal nerve. This muscle acts to shorten and widen the pharynx and elevate the larynx during swallowing.
What is nerve accessory?
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.
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 forms Passavant's Ridge?
The bulge of posterior pharyngeal wall that meets the soft palate is called Passavant’s ridge. B. As the velopharyngeal port begins to close , Passavant’s ridge begins to form in the posterior pharyngeal wall across from the soft palate.
What happens to the soft palate during swallowing?
During swallowing, the soft palate is pulled up, causing it to press against the posterior pharyngeal wall. When elevated in this way, it completely blocks and separates the nasal cavity and nasal portion of the pharynx from the mouth and the oral part of the pharynx.
What muscle depresses the velum?
Depression of the soft palate is achieved through the contraction of the palatoglossus and palatopharyngeus muscles. These muscles form the body of the faucal pillars from which the uvula hangs and were observed during the dissection of the tongue.
Does anxiety affect the vagus nerve?
Although this vagal tone is also connected to inflammation, immune system, metabolism and emotional regulation, which is essential to our body. This means the vagus nerve has been associated with mental health conditions, such as anxiety.
