Which part of the brain does the vestibulocochlear nerve emerge?
The vestibulocochlear nerve emerges from the ventrolateral margin of the brain stem near the junction of the medulla, pons, and cerebellum (the cerebellopontine angle).
What is innervated by the vestibulocochlear nerve?
The vestibulocochlear nerve (CN VIII) is the eighth cranial nerve and has two roles: innervation to the cochlea for hearing. innervation to the vestibule for acceleration and balance senses.
Where does the vestibulocochlear nerve synapse on the thalamus?
Abbreviations
| CL | Centrolateral Nucleus |
|---|---|
| SpVN | spinal (descending) vestibular Nucleus |
| SuVN | Superior Vestibular Nucleus |
| VA | Ventroanterior Nucleus |
| VI | Ventral Intermediate Nucleus |
Where does the vestibular nerve come from?
The vestibular portion of the vestibulocochlear nerve originates in a group of nerve cells called the vestibular ganglion, in the internal acoustic meatus, a channel in the temporal bone through which the facial and auditory nerves and some blood vessels run.
What is the other name of vestibulocochlear nerve?
The vestibulocochlear nerve, also known as cranial nerve eight (CN VIII), consists of the vestibular and cochlear nerves. Each nerve has distinct nuclei within the brainstem.
Where does the vestibulocochlear nerve start and end?
It emerges from the pontomedullary junction and exits the inner skull via the internal acoustic meatus (or internal auditory meatus) in the temporal bone. The vestibulocochlear nerve carries axons of type SSA (special somatic afferent).
Is the vestibulocochlear nerve sensory or motor?
Table of cranial nerves
| No. | Name | Sensory, motor, or both |
|---|---|---|
| V | Trigeminal | Both sensory and motor |
| VI | Abducens | Mainly motor |
| VII | Facial | Both sensory and motor |
| VIII | Vestibulocochlear In older texts: auditory, acoustic. | Mostly sensory |
How many vestibular nuclei are there?
four
There are four 2nd order vestibular nuclei: the inferior, medial, lateral (Deiter’s) and superior vestibular nuclei. All four nuclei are found beneath the floor of the fourth ventricle in the medulla and pons, lateral to the sulcus limitans.
What is the name of CN V?
The trigeminal nerve is the fifth cranial nerve (CN V). Its primary function is to provide sensory and motor innervation to the face. The trigeminal nerve consists of three branches on either side that extend to different territories of the face.
Where is the 8th nerve?
The vestibulocochlear nerve is located in the internal auditory meatus (internal auditory canal). The nerve is responsible for equilibrium and hearing.
Where does the vestibulocochlear nerve enter the brain?
Two parts of the vestibulocochlear nerve that are vestibular and cochlear parts leave the anterior surface of the brain between the medulla oblongata and the lower border of the pons. These two parts run laterally in the posterior cranial fossa and enter the internal acoustic meatus with the facial nerve.
Where is the vestibular ganglion located?
As one of the 12 cranial nerves, it runs between the pons (the middle of the brainstem) and the medulla oblongata (the lower part of the brainstem). The vestibular part of the nerve then travels from the inner ear in a group of nerve cells called the vestibular ganglion.
What is the treatment for vestibulocochlear nerve disorders?
Treatment for conditions of the vestibulocochlear nerve usually involves managing symptoms until they resolve. Sometimes further intervention, like medication or surgery is required. Vestibular neuritis and labyrinthitis are managed with medication to manage nausea and dizziness. These medications should not be taken for more than several days.
What is the vestibular apparatus?
The vestibular apparatus, where the vestibular part of the nerve originates, detects changes in the head’s position based on gravity. Then the position of the head communicates information about balance to the brain. Conditions of the vestibulocochlear nerve can affect balance and hearing.