Glossopharyngeal nerveInnervatesMotor: stylopharyngeus Sensory: Oropharynx, Eustachian tube, middle ear, posterior third of tongue, carotid sinus, carotid body Special sensory: Taste to posterior third of tongueIdentifiersLatinnervus glossopharyngeusMeSHD005930
What is the function of Glossopharyngeal?
The glossopharyngeal nerve supplies sensory innervation to the oropharynx, and thus carries the afferent information for the gag reflex. When a foreign object touches the back of the mouth, this stimulates CNIX, beginning the reflex. The efferent nerve in this process is the vagus nerve, CNX.
What muscles are innervated by the vagus nerve?
Vagus nerveInnervatesLevator veli palatini, Salpingopharyngeus, Palatoglossus, Palatopharyngeus, Superior pharyngeal constrictor, Middle pharyngeal constrictor, Inferior pharyngeal constrictor, visceraIdentifiersLatinnervus vagusMeSHD014630
Does the Glossopharyngeal nerve innervate the heart?
All of these three cranial nerves are involved in the complex and important functions of the body, such as blood pressure regulation, heart rate, breathing, swallowing and vomiting.What Innervates tympanic nerve?
The tympanic nerve provides sensation to the middle ear (tympanic cavity). This includes the internal surface of the tympanic membrane. It also supplies the Eustachian tube, the parotid gland, and mastoid air cells. … These neurons then provide secretomotor innervation of the parotid gland via the auriculotemporal nerve.
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.
Which gland receives parasympathetic innervation from the glossopharyngeal nerve CN IX?
The parotid gland receives parasympathetic innervation via fibers of the glossopharyngeal nerve (CN IX) and auriculotemporal nerve. The preganglionic fibers, carried by the glossopharyngeal nerve, synapse in the otic ganglion.
Which muscle is innervated by the superior laryngeal branch?
The superior laryngeal branch of the vagus nerve originates from the 4th pharyngeal arch along with the cricothyroid muscle. This developmental pattern elucidates why the cricothyroid muscle is the only muscle that receives innervation via the superior laryngeal nerve.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) …
What does the phrenic nerve innervate?The phrenic nerve originates from the anterior rami of the C3 through C5 nerve roots and consists of motor, sensory, and sympathetic nerve fibers. It provides complete motor innervation to the diaphragm and sensation to the central tendon aspect of the diaphragm.
Article first time published onWhat does the hypoglossal nerve innervate?
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.
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 the stylopharyngeus muscle?
The stylopharyngeus muscle is a long, slender and tapered longitudinal pharyngeal muscle that runs between the styloid process of the temporal bone and the pharynx and functions during the pharyngeal phase of swallowing.
Which organs are innervated by the parasympathetic axons from the celiac ganglion?
These ganglia contain neurons whose postganglionic axons innervate the stomach, liver, gallbladder, spleen, kidney, small intestine, and the ascending and transverse colon. They directly innervate the ovarian theca and secondary interstitial cells and exert an indirect action on the luteal cells.
What type of innervation causes pupil dilation?
Dilation of the pupil occurs when the smooth cells of the radial muscle, controlled by the sympathetic nervous system (SNS), contract.
Which autonomic plexus Innervates viscera within the pelvic region?
The inferior hypogastric autonomic plexus, which receives contributions from the lumbar splanchnic nerves (sympathetic), sacral sympathetics, and pelvic splanchnic nerves (parasympathetic), helps to supply the pelvic viscera with autonomic fibers.
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 the trapezius innervated by?
Cranial nerve XI innervates the motor function of the trapezius. The function of the trapezius is to stabilize and move the scapula. The upper fibers can elevate and upwardly rotate the scapula and extend the neck.
Which head neck muscle is innervated by a cranial nerve?
Sternocleidomastoid and trapezius muscles are innervated by the lower part of cranial nerve XI (Standring, 2008).
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 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 nerve innervates all the intrinsic muscles of the larynx?
Inferior laryngeal branch of the recurrent laryngeal nerve: excluding the cricothyroid muscle [innervated by the superior laryngeal nerve], the inferior laryngeal branch of the recurrent laryngeal nerve innervates all intrinsic muscles of the larynx.
What nerve Innervates the vocal folds?
The primary innervation to the vocal folds comes from branches of the vagus nerve, which are the superior and inferior laryngeal nerves. The superior laryngeal nerve splits into the external laryngeal nerve and the internal laryngeal nerve approximately at the level of the greater horn of the hyoid.
What Innervates the posterior cricoarytenoid muscle?
The posterior cricoarytenoid is the sole abductor of the vocal folds and is innervated by the recurrent laryngeal nerve.
Does vagus nerve innervate diaphragm?
The phrenic is the motor and sensory nerve of the diaphragm. The vagus provides the parasympathetic supply for all the organs of the thorax and abdomen. The courses of these two nerves are similar: they both start in the neck, run downward in the mediastinum, and pass through the diaphragm.
What spinal plexus includes the phrenic nerve?
The phrenic nerve is derived from the cervical plexus and receives innervation from the C3, C4, and C5 nerve roots. It is the longest branch of the cervical plexus.
Which main structure do the intercostal nerves supply?
The intercostal nerves supply innervation to the skin and musculature of the chest and abdominal walls. Although the nerves are traditionally believed to travel in the groove at the inferior aspect of the rib along with the intercostal arteries and veins, the nerves can also lie in between the ribs.
What is hypoglossal canal?
The hypoglossal canal is located between the occipital condyle and jugular tubercle and runs obliquely forwards (posteromedial to anterolateral) allowing the hypoglossal nerve to exit the posterior cranial fossa.
Which muscle of the floor of the mouth is innervated by the hypoglossal nerve?
The styloglossus muscle is innervated by the hypoglossal nerve (CN XII). The hyoglossus muscle depresses and retracts the tongue and is innervated by the hypoglossal nerve (CN XII).
