Where does the auditory nerve go
The auditory nerve is part of the vestibulocochlear nerve. This is the 8th of a total of 12 cranial nerves. One of the tasks of the vestibulocochlear nerve is to transport information from the balance organ and cochlea to the brain.
The vestibulocochlear nerve consists of a bundle of nerve fibers that strive from the inner ear and the balance organ to the brain (shown in yellow in the figure below). On the one hand, it is responsible for the transmission of information from the organ of equilibrium and, on the other hand, for the transmission of sounds received via the outer and middle ear.
Anatomy and physiology of the auditory nerve
The vestibulocochlear nerve consists of two parts: the cochlear nerve (auditory nerve) and the vestibular nerve (equilibrium nerve).
The information that is received via the hair cells of the inner ear is passed on to the auditory cortex through the auditory nerve and various connection points up to the cerebral cortex.
The auditory nerve not only transmits information in the direction of the brain (afferent), but also transmits impulses in the opposite direction, for example from the brain to the inner ear (efferent), which can be used to fine-tune the sensory cells of the inner ear.
In which diseases is the auditory nerve affected?
Acoustic neuroma is a condition in which the vertebral cochlear nerve is affected and in which tinnitus occasionally occurs. This is a benign neoplasm that emerges from the Schwann cells of the auditory nerve. Hence the disease is also called vestibular schwannoma.
The lump of the acoustic neuroma exerts pressure on the nerve and disrupts the transmission of signals to the auditory cortex, which can lead to the perception of tinnitus. Other symptoms of this condition may include dizziness or unilateral hearing loss.
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