How do you assess cranial nerve 7?
Facial nerve (CN VII) Assess the patient for facial symmetry. Have him wrinkle his forehead, close his eyes, smile, pucker his lips, show his teeth, and puff out his cheeks. Both sides of the face should move the same way. When the patient smiles, observe the nasolabial folds for weakness or flattening.
What does glossopharyngeal nerve do?
As stated above, the glossopharyngeal nerve provides motor innervation to the stylopharyngeus muscle, which is responsible for elevating the pharynx and larynx.
What happens if cranial nerve 7 is damaged?
If there is cranial nerve VII nerve damage, this muscle is paralyzed. Because the branch of the seventh cranial nerve that goes to the stapedius muscle begins very proximally, hyperacusis due to seventh cranial nerve lesions indicates a lesion close to the nerve’s origin in the brainstem rather than more peripheral.
Is cranial nerve 7 motor or sensory?
Table of cranial nerves
| No. | Name | Sensory, motor, or both |
|---|---|---|
| VI | Abducens | Mainly motor |
| VII | Facial | Both sensory and motor |
| VIII | Vestibulocochlear In older texts: auditory, acoustic. | Mostly sensory |
| IX | Glossopharyngeal | Both sensory and motor |
What cranial nerve is 7?
The facial nerve is the seventh cranial nerve (CN VII). It arises from the brain stem and extends posteriorly to the abducens nerve and anteriorly to the vestibulocochlear nerve.
What is the main function of CN IX?
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 the major function of the glossopharyngeal nerve quizlet?
The glossopharyngeal nerve is cranial nerve IX. Its major motor function is to help in swallowing.
Is it possible to remove the glossopharyngeal nerve?
In severe cases, surgery may be necessary to remove pressure from the glossopharyngeal nerve. This may involve removing the cause of the pressure on the nerve or severing the nerve so that it no longer causes pain. [1]
Is the glossopharyngeal nerve a sensory or sensory nerve?
Embryologically, the glossopharyngeal nerve is associated with the derivatives of the third pharyngeal arch. Sensory: Innervates the oropharynx, carotid body and sinus, posterior 1/3 of the tongue, middle ear cavity and Eustachian tube. Special sensory : Provides taste sensation to the posterior 1/3 of the tongue.
What are the symptoms of vagal stimulation in glossopharyngeal neuralgia?
A subset of patients with glossopharyngeal neuralgia also experienced symptoms of excessive vagal stimulation during attacks, with symptoms such as bradycardia, hypotension, syncope, seizures, or cardiac arrest.[6]
What causes irritation of the glossopharyngeal nerve?
[1] Glossopharyngeal neuralgia is thought to be caused by irritation of the glossopharyngeal nerve, but the exact cause of the irritation is sometimes unknown. [1] Laboratory and imaging tests can be used to diagnose the disorder and rule out serious underlying problems.