The vestibulocochlear nerve is responsible for sending information from the cochlea and vestibule to the brain, stimuli which will be interpreted in the form of sound and balance. While the cochlear part of the nerve is responsible for the sense of hearing, the vestibular part is responsible for aspects related to balance. This nerve carries somatic afferent fibers from structures in the inner ear. The vestibulocochlear nerve (scientific name: nervus vestibulocochlearis) is the eighth cranial nerve (CN VIII), which is divided into two parts, the vestibular and the cochlear, both divisions being in charge of sensory function. When the second is not working well, the consequence is dizziness.
When the first fails, our hearing suffers. The auditory nerve is made up of two nerves of its own: the cochlear nerve, which carries information about sound, and the vestibular nerve, which carries information about balance. In this post we explain in detail what the auditory nerve is. Its role is key to communicate, as it is responsible for processing the auditory impulses from the outer ear.įor this reason, when the auditory nerve is damaged and does not function properly, hearing loss always occurs. One of them, responsible for balance and hearing, is the auditory nerve, also called the vestibulocochlear nerve or the statoacoustic nerve. The human skull has twelve pairs of nerves connected to the brain. The auditory nerve, also known as the vestibulocochlear nerve or the statoacoustic nerve, is responsible for auditory function and balance. What is the function of the auditory nerve? In this article we are going to answer the question ‘’What is the function of the auditory nerve?’’ We will explain what the auditory nerve is, what its parts are and its functions. Let’s take a closer look at the importance of this nerve. The way it sends information to the brain is somewhat complex, involving multiple pathways and activating several specific regions and types of neurons. The results can be used to explain deviations in whole-nerve recordings in abnormal cochleas.The vestibulocochlear nerve constitutes the eighth cranial nerve pair and its function is essential for our survival, since it is thanks to it that we can hear and maintain our balance.
The various features in the click responses were in most cases consistent with the type of FTC. PSTHs for type I have longer dominant-peak latencies and smaller amplitudes PSTHs for type II were normal well above the fiber’s threshold PSTHs for type III revealed remarkable patterns with multiple peaks, part of them with a latency strongly varying with polarity PSTHs for type IV showed narrow peaks and steep amplitude/intensity curves PSTHs for type V showed a multiple peaked pattern and large amplitudes and steep amplitude/intensity curves to rarefaction polarity. The click PSTHs of abnormal fibers were compared to normal PSTHs at equal sound-pressure levels, and various abnormal trends were found corresponding to the type of FTC. Type I is elevated as a whole, type II has an elevated (and often broadened) tip and a tail at normal level, type III has low thresholds in the tail (often hypersensitive), type IV represents a flat tuning, and type V has no tip but shows a clear appearance of the tail (often hypersensitive).
Five types of abnormal FTCs are distinguished. The PSTHs found in fibers with elevated thresholds are discussed in relation to the frequency threshold curves (FTCs) measured in these fibers. Poststimulus time histograms (PSTHs) were recorded for various click intensities and for the two click polarities. This paper describes auditory-nerve single-fiber responses to clicks in noise-damaged cochleas.
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