How does glossopharyngeal nerve affect the brain?
The glossopharyngeal nerve helps move the muscles of the throat and carries information from the throat, tonsils, and tongue to the brain. The cause is often unknown but sometimes is an abnormally positioned artery that puts pressure on (compresses) the glossopharyngeal nerve.
Where does the glossopharyngeal nerve exit the skull?
Structure. From the anterior portion of the medulla oblongata, the glossopharyngeal nerve passes laterally across or below the flocculus, and leaves the skull through the central part of the jugular foramen. From the superior and inferior ganglia in jugular foramen, it has its own sheath of dura mater.
Where does the glossopharyngeal nerve innervate?
The axons that belong to the glossopharyngeal nerve provide motor innervation to the stylopharyngeus muscle and the superior pharyngeal constrictor muscle.
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.
Where is glossopharyngeal nerve located?
Glossopharyngeal nerve (Cranial nerve IX)
| Type | Mixed nerve |
|---|---|
| Origin | Brainstem |
What is the pathway of the glossopharyngeal nerve?
After passing through the jugular foramen, the glossopharyngeal nerve descends forward and inferiorly, aiming to the root of the tongue. In that phase of its course, the nerve forms an arch that is placed superiorly and parallel to the arch of the hypoglossal nerve.
How do you assess the glossopharyngeal nerve?
Glossopharyngeal Nerve (IX) 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 is the function of the glossopharyngeal nerve quizlet?
It provides sensory information about taste, sensation to the tongue and pharynx and information from chemo/baro-receptors in the carotid artery.
What does the motor portion of the glossopharyngeal nerve innervate quizlet?
Motor Nerve innervate stylopharyngeal muscle of the pharynx for swallowing.
What is the responsibility of the hypoglossal nerve quizlet?
The hypoglossal nerve controls tongue movements.
What are the symptoms of glossopharyngeal neuralgia?
Glossopharyngeal neuralgia is a rare condition in which there are repeated episodes of severe pain in the tongue, throat, ear, and tonsils….Symptoms include severe pain in areas connected to the ninth cranial nerve:
- Back of the nose and throat (nasopharynx)
- Back of the tongue.
- Ear.
- Throat.
- Tonsil area.
- Voice box (larynx)
What nerve helps you swallow?
The vagal nerve (VN), the tenth cranial nerve, provides both motor and sensory innervation, and plays an important role in the pharyngeal phase of swallowing [4, 6].
Where is the glossopharyngeal nucleus located?
Glossopharyngeal nuclei The nuclei for the glossopharyngeal nerve all lie in the inferior pontine and medullary regions of the brainstem. The nuclei that contribute to it include: (Rostral) Solitary nucleus: special sense of taste. Dorsal motor nucleus: secretomotor to the oropharynx.
What cranial nerve controls tongue?
Hypoglossal Nerve
The Hypoglossal Nerve is the 12th Cranial Nerve (Cranial Nerve XII). It is mainly an efferent nerve for the tongue musculature. The nerve originates from the medulla and travels caudally and dorsally to the tongue.
What nerve controls the gag reflex?
The afferent limb of the reflex is supplied by the glossopharyngeal nerve (cranial nerve IX), which inputs to the nucleus solitarius and the spinal trigeminal nucleus. The efferent limb is supplied by the vagus nerve (cranial nerve X) from the nucleus ambiguus. All of these are located in the medulla.
What is the function of the Glossopharyngeal nerve quizlet?
What is the function of the glossopharyngeal nerve CN IX?
The Glossopharyngeal Nerve (CN IX) 1 Anatomical Course. The glossopharyngeal nerve originates in the medulla oblongata of the brain. 2 Sensory Functions. The glossopharyngeal nerve provides sensory innervation a variety of structures in the head and neck. 3 Special Sensory. 4 Motor Functions. 5 Parasympathetic Functions.
What causes glossopharyngeal neuralgia (GPN)?
Glossopharyngeal neuralgia (GPN) is believed to be caused by irritation of the ninth cranial nerve, called the glossopharyngeal nerve. Symptoms usually begin in people over age 50. In most cases, the source of irritation is never found.
Structure and Location The glossopharyngeal nerve exits the cranial cavity (skull) through a structure called the jugular foramen, which is a large opening in the base of the skull. It then gives off a branch called the tympanic nerve, which goes through the temporal bone to reach the middle ear.