Asked by: Nadin Raisch
medical health brain and nervous system disorders

What does the 9th cranial nerve do?

Last Updated: 29th April, 2020

44
The glossopharyngeal nerve, known as the ninth cranial nerve (CN IX), is a mixed nerve that carries afferent sensory and efferent motor information. It exits the brainstem out from the sides of the upper medulla, just anterior (closer to the nose) to the vagus nerve.

Click to see full answer.

Consequently, what happens if the Glossopharyngeal nerve is damaged?

The glossopharyngeal nerve is a mixed cranial nerve originating in the medulla oblongata. Damage to the nerve can result in a loss of taste, particularly bitter and sour flavors, and trouble swallowing.

Likewise, what will be the effect of paralysis of 9th nerve? Infection such as skull base osteomylitis, skull base fractures, or neoplasms may affect the three nerves in concert, resulting in ipsilateral vocal fold, palate, and shoulder weakness. Paralysis of the stylopharyngeus muscle will be undetected by the patient if the vagus nerve is intact.

Additionally, what does Glossopharyngeal nerve control?

Glossopharyngeal nerve. The glossopharyngeal nerve is a paired set of nerves, which is part of the 24 cranial nerves. The glossopharyngeal nerve has many functions, including receiving various forms of sensory fibers from parts of the tongue, carotid body, the tonsils, the pharynx, and the middle ear.

What is the function of the vagus cranial nerve?

The most important function of the vagus nerve is afferent, bringing information of the inner organs, such as gut, liver, heart, and lungs to the brain.

Related Question Answers

Raffaella Panzuela

Professional

How do you test cranial nerve IX?

Clinical Testing of Cranial Nerves IX and X:
  1. Ask to say “ahhh” to check uvula elevation - Cranial nerve X (motor)
  2. Ask to say “ahhh” to check constriction of posterior pharyngeal wall Cranial nerve IX (motor)
  3. Stroke left or right pharynx to elicit gag reflex - Cranial nerve IX (viscerosensory) and Cranial X (motor)

Zhiming Baumgarte

Professional

What is cranial nerve IX?

The glossopharyngeal nerve, known as the ninth cranial nerve (CN IX), is a mixed nerve that carries afferent sensory and efferent motor information. It exits the brainstem out from the sides of the upper medulla, just rostral (closer to the nose) to the vagus nerve.

Bernadette Quesnoy

Explainer

What happens if the Vestibulocochlear nerve is damaged?

The vestibulocochlear nerve is responsible for both hearing and balance and brings information from the inner ear to the brain. Problems with the vestibulocochlear nerve can result in vertigo, vomiting, ringing in the ears, a false sense of motion, motion sickness, or even hearing loss.

Classie Danehl

Explainer

How do you remember the cranial nerves?

Mnemonics
  1. O: olfactory nerve (CN I)
  2. O: optic nerve (CN II)
  3. O: oculomotor nerve (CN III)
  4. T: trochlear nerve (CN IV)
  5. T: trigeminal nerve(CN V)
  6. A: abducens nerve (CN VI)
  7. F: facial nerve (CN VII)
  8. A: auditory (or vestibulocochlear) nerve (CN VIII)

Fermina Ipar-Izar

Explainer

What cranial nerves are involved in swallowing?

The following cranial nerves are involved in swallowing:
  • Trigeminal (cranial nerve V)
  • Facial (cranial nerve VII)
  • Glossopharyngeal (cranial nerve IX)
  • Vagus (cranial nerve X)
  • Hypoglossal nerve (cranial nerve XII)

Saleck Yudushkin

Pundit

Where is cranial nerve 9 located?

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.

Tfarrah Yoan

Pundit

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.

Clive Zarallo

Pundit

What muscles does cranial nerve 9 innervate?

The glossopharyngeal nerve (ninth cranial nerve, CN IX, latin: nervus glossopharyngeus) is a mixed cranial nerve. The glossopharyngeal nerve provides motor innervation to the stylopharyngeus muscle and the superior constrictor pharyngeal muscle.

Castulo Hueltes

Pundit

What nerve controls the gag reflex?

As with all reflexes, the gag reflex has a sensory and a motor limb. The sensory limb is mediated predominantly by CN IX, the motor limb by CN X. Touching the soft palate can lead to a similar reflex response. However, in this case, the sensory limb of the reflex is the trigeminal nerve.

Natalina Kopeloff

Pundit

Is Glossopharyngeal neuralgia serious?

Glossopharyngeal neuralgia. Glossopharyngeal neuralgia is a rare condition in which there are repeated episodes of severe pain in the tongue, throat, ear, and tonsils. This can last from a few seconds to a few minutes.

Tayisiya Donkel

Teacher

What causes damage to the Glossopharyngeal nerve?

The pain may be triggered by swallowing, speaking, laughing, chewing, or coughing. Glossopharyngeal neuralgia is thought to be caused by irritation of the glossopharyngeal nerve, but the exact cause of the irritation is sometimes unknown.

Lamya Errecarte

Teacher

Where is the vagus nerve located?

The vagus nerve runs from the brain through the face and thorax to the abdomen. It is a mixed nerve that contains parasympathetic fibres. The vagus nerve has two sensory ganglia (masses of nerve tissue that transmit sensory impulses): the superior and the inferior ganglia.

Eba Asenova

Teacher

Where is 7th cranial nerve located?

Where is the 7th Cranial Nerve located? The two 7th Cranial Nerves (CN VII) are located on either side of the brainstem, at the top of the medulla. They are mixed cranial nerves with BOTH sensory and motor function.

Venanci Letemendia

Teacher

What are the symptoms of Glossopharyngeal neuralgia?

Symptoms of glossopharyngeal neuralgia may include severe pain in areas connected to the ninth cranial nerve, which are:
  • Nasopharynx, or back of the nose and throat.
  • Back of the tongue.
  • Ear.
  • Tonsil area.
  • Larynx or voice box.

Leonilde Compadre

Reviewer

Which lobe does the Glossopharyngeal nerve send information to?

The glossopharyngeal nerve (IX): This nerve receives sensory information from the tonsils, the pharynx, the middle ear, and the rest of the tongue.

Nais Leña

Reviewer

What muscles are innervated by the glossopharyngeal nerve?

Containing both sensory and motor components, the glossopharyngeal nerve provides somatic motor innervation to the stylopharyngeus muscle, visceral motor innervation to the parotid gland, and carries afferent sensory fibers from the posterior third of the tongue, pharynx, and tympanic cavity.

Issaka Schonheinz

Reviewer

Iaroslava Alvarinhas

Reviewer

Phylis Rotllant

Supporter

What nerve controls facial expression?

Facial nerve. The nerves of the scalp, face, and side of neck. The facial nerve is the seventh cranial nerve, or simply CN VII. It emerges from the pons of the brainstem, controls the muscles of facial expression, and functions in the conveyance of taste sensations from the anterior two-thirds of the tongue.