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).
Which cranial nerves are located on the brain stem?
Cranial nerves are the nerves that emerge directly from the brain (including the brainstem), in contrast to spinal nerves (which emerge from segments of the spinal cord)….Gov’t Insurance.
| Forebrain | ||
|---|---|---|
| IX. | Glossopharyngeal nerve | Afferent and Efferent |
| X. | Vagus nerve | Afferent and Efferent |
| XI. | Accessory nerve | Mostly Efferent |
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.
Which cranial nerve is the vestibulocochlear nerve?
cranial nerve eight
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 enter the brainstem?
The eighth nerve enters the brain stem at the junction of the pons and medulla lateral to the facial nerve. The auditory component of the eighth nerve terminates in a sensory nucleus called the cochlear nucleus which is located at the junction of the pons and medulla.
What two nerves do not arise from the brain stem?
The olfactory nerve is the shortest of the 12 cranial nerves and only one of two cranial nerves (the other being the optic nerve) that do not join with the brainstem.
What causes damage to the vestibulocochlear nerve?
Researchers think the most likely cause is a viral infection of the inner ear, swelling around the vestibulocochlear nerve (caused by a virus), or a viral infection that has occurred somewhere else in the body.
What does the vestibulocochlear nerve innervate?
Cranial Nerve VIII The vestibular nerve transmits afferent signals from the labyrinths through the internal auditory canal (IAC). In addition to the vestibular nerve, the IAC also contains the cochlear nerve (hearing), the facial nerve, the nervus intermedius (a branch of the facial nerve), and the labyrinthine artery.
Where does the vestibulocochlear nerve split?
The vestibulocochlear nerve then extends anteriorly and laterally. Together with the facial and the intermediate nerve, it enters the internal acoustic meatus. At the fundus of the internal acoustic meatus, the nerve splits into its two roots, vestibular and cochlear.
What happens when the vestibulocochlear nerve is damaged?
The vestibulocochlear nerve sends balance and head position information from the inner ear (see left box) to the brain. When the nerve becomes swollen (right box), the brain can’t interpret the information correctly. This results in a person experiencing such symptoms as dizziness and vertigo.