The glossopharyngeal nerve provides sensory supply to the palate. It can be tested with the gag reflex by touching the pharynx with a tongue depressor or by touching the arches of the pharynx.
What happens when the glossopharyngeal nerve is damaged?
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 is the function of the glossopharyngeal nerve?
As stated above, the glossopharyngeal nerve provides motor innervation to the stylopharyngeus muscle, which is responsible for elevating the pharynx and larynx.
What does the glossopharyngeal nerve stimulate?
The glossopharyngeal and vagus nerves innervate the muscles of the pharynx and larynx. These are involved in swallowing and speaking. The glossopharyngeal nerve also carries touch sensation from the posterior one-third of the tongue, tonsils, tympanic membrane, and Eustachian tube.
Is glossopharyngeal neuralgia life threatening?
Glossopharyngeal neuralgia is life-threatening condition because it is associated with cardiac arrest, hypotension, syncope and weight loss. Treatment with carbamazepine is affected in patients with cardiovascular manifestations.
Can glossopharyngeal nerve damage be repaired?
In severe cases, when pain is difficult to treat, surgery to take pressure off the glossopharyngeal nerve may be needed. This is called microvascular decompression. The nerve can also be cut (rhizotomy). Both surgeries are effective.
Does the glossopharyngeal nerve control blood pressure?
The glossopharyngeal and vagus cranial nerves provide the brainstem with sensory inputs from different receptors in the heart, lung, and vasculature. This afferent information is critical for the short-term regulation of arterial blood pressure and the buffering of emotional and physical stressors.
How do you fix glossopharyngeal nerve damage?
The most effective drugs are antiseizure medicines such as carbamazepine. Antidepressants may help certain people. In severe cases, when pain is difficult to treat, surgery to take pressure off the glossopharyngeal nerve may be needed. This is called microvascular decompression.
What muscles does Glossopharyngeal nerve innervate?
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.
Can the Glossopharyngeal nerve be repaired?
Repair of Hypoglossal Nerve Injury If an acute injury is suspected, repair should be undertaken as soon as possible. Similar to facial nerve repairs, the ideal management involves establishment of a tension-free anastomosis (Avitia & Osborne, 2008).
What is glossopharyngeal neuralgia (GPN)?
Glossopharyngeal neuralgia (GPN) is an uncommon facial pain syndrome often misdiagnosed as trigeminal neuralgia. The rarity of this condition and its overlap with other cranial nerve hyperactivity syndromes often leads to a significant delay in diagnosis.
What are the benefits of a glossopharyngeal nerve block?
Described as useful for neuralgia, abolishing gag reflex for surgery or endodontics, managing postoperative pain after tonsillectomy as per Sitzman (1997) study of awake direct laryngoscopy – various approaches to glossopharyngeal nerve block – topical vs injectinon – concluded the gargle and 10% spray preferred to GPN block by injection
What does it mean to have no glossopharyngeal reflex?
The complete absence of this reflex is a pathological finding, and it suggests that the patient suffers bilateral lesion of the glossopharyngeal nerve, whereas the pathological result only on the one side of the throat suggests that there is a lesion of the ipsilateral nerve.
What nerve innervates the glossopharyngeal nerve?
The glossopharyngeal nerve has its origin in the medulla oblongata and exits the skull via the jugular foramen, which is where the tympanic nerve branches off to give parasympathetic innervation to the parotid gland.
