Question - What does the Glossopharyngeal nerve innervate?

Answered by: Evelyn Flores  |  Category: General  |  Last Updated: 28-06-2022  |  Views: 1203  |  Total Questions: 14

The glossopharyngeal nerve provides motor innervation to the stylopharyngeus muscle and the superior constrictor pharyngeal muscle. With sensory fibers the nerve supplies the root of the tongue (including the vallate papillae), as well as the mucosa of the tympanic cavity, the auditory tube, and the mastoid cells. 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. There are a number of functions of the glossopharyngeal nerve: It receives general somatic sensory fibers (ventral trigeminothalamic tract) from the tonsils, the pharynx, the middle ear and the posterior 1/3 of the tongue. It receives special visceral sensory fibers (taste) from the posterior 1/3 of the tongue. The glossopharyngeal nerve provides sensory supply to the palate. It can be tested with the gag reflex or by touching the arches of the pharynx.

The glossopharyngeal nerve exits from the jugular foramen in proximity to the vagus and accessory nerve and the internal jugular vein. All three nerves lie in the groove between the internal jugular vein and internal carotid artery (Fig.

Glossopharyngeal neuralgia is generally caused by a small blood vessel that presses on the nerves as they exit the brainstem. This condition is caused by irritation of the ninth cranial nerve by a blood vessel, and is most commonly seen in people over age 40.

Mnemonics O: olfactory nerve (CN I) O: optic nerve (CN II) O: oculomotor nerve (CN III) T: trochlear nerve (CN IV) T: trigeminal nerve(CN V) A: abducens nerve (CN VI) F: facial nerve (CN VII) A: auditory (or vestibulocochlear) nerve (CN VIII)

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

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.

Medical Definition of glossopharyngeal 1 : of or relating to both tongue and pharynx. 2 : of, relating to, or affecting the glossopharyngeal nerve glossopharyngeal lesions.

To test the vagus nerve, a doctor may check the gag reflex. During this part of the examination, the doctor may use a soft cotton swab to tickle the back of the throat on both sides. This should cause the person to gag. If the person doesn't gag, this may be due to a problem with the vagus nerve.

Gross Anatomy. The vagus nerve is the longest cranial nerve. It contains motor and sensory fibers and, because it passes through the neck and thorax to the abdomen, has the widest distribution in the body. It contains somatic and visceral afferent fibers, as well as general and special visceral efferent fibers.

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.

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.

Olfactory nerves Also known as CN1, the olfactory nerve is the first of 12 cranial nerves located within the head. It relays sensory data to the brain, and it is responsible for the sense of smell. The nerve's olfactory receptors are located within the mucosa of the nasal cavity.

Check hearing by rubbing your fingers together by each ear. Cranial nerves IX and X, which innervate the tongue and throat (pharynx and larynx), are checked together. Assess the sense of taste on the back of the tongue.

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.