The purpose of the perilymph-filled tympanic duct and vestibular duct is to depolarise and send impulses to the brain via the cochlear nerve.
12.
The walls of the membranous labyrinth are lined with distributions of the cochlear nerve, one of the two branches of the vestibulocochlear nerve.
13.
When a louder sound is heard, more hair cells are stimulated and the intensity of firing of axons in the cochlear nerve is increased.
14.
The more intense this vibration is, the more the hair cells are deflected and the more likely they are to cause cochlear nerve firings.
15.
The cell bodies of the cochlear nerve lie within the cochlea and collectively form the spiral ganglion, named for the spiral shape it shares with the cochlea.
16.
The exact mechanism by which sound is transmitted by the neurons of the cochlear nerve is uncertain; the two competing theories are place theory and temporal theory.
17.
This damage may affect the initiation of the nerve impulse in the cochlear nerve or the transmission of the nerve impulse along the nerve into the brainstem.
18.
In this way, pressure on the cochlear nerve is relieved, reducing the risk of further hearing loss from direct compression or obstruction of vascular supply to the nerve.
19.
Auditory canal decompression is another surgical technique that can prolong usable hearing when a vestibular schwannoma has grown too large to remove without damage to the cochlear nerve.
20.
Auditory brainstem response testing is an electrophysiological test used to test for hearing deficits caused by pathology within the ear, the cochlear nerve and also within the brainstem.
