Auditory Nerve Function
Auditory Nerve Function - Related Videos
10:53
Optogenetic Stimulation of the Auditory Nerve
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Cited by 23 •
2014
Cochlear implants (CIs) enable hearing by direct electrical stimulation of the auditory nerve. However, poor frequency and intensity resolution limits the quality of hearing with CIs. Here we describe optogenetic stimulation of the auditory nerve in mice as an alternative strategy for auditory research and developing future CIs.
11:27
Selective Tracing of Auditory Fibers in the Avian Embryonic Vestibulocochlear Nerve
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Cited by 3 •
2013
Here we describe a microdissection technique followed by fluorescent dye injection into the acoustic ganglion of early chick embryos for selective tracing of auditory axon fibers in the nerve and hindbrain.
02:59
Auditory Nerve Root Stimulation and Postsynaptic Current Recordings in a Mouse Brain Wedge Slice
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2025
This video demonstrates a protocol for stimulating the auditory nerve root and recording postsynaptic currents in medial olivocochlear neurons in mouse brain wedge slices.
10:50
Functional Imaging of Auditory Cortex in Adult Cats using High-field fMRI
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Cited by 6 •
2014
Functional studies of the auditory system in mammals have traditionally been conducted using spatially-focused techniques such as electrophysiological recordings. The following protocol describes a method of visualizing large-scale patterns of evoked hemodynamic activity in the cat auditory cortex using functional magnetic resonance imaging.
13:05
Functional Magnetic Resonance Imaging (fMRI) with Auditory Stimulation in Songbirds
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Cited by 12 •
2013
This article shows an optimized procedure for imaging of the neural substrates of auditory stimulation in the songbird brain using functional Magnetic Resonance Imaging (fMRI). It describes the preparation of the sound stimuli, the positioning of the subject and the acquisition and subsequent analysis of the fMRI data.
FAQs
The basilar membrane converts incoming sound-related movement into a mechanical pattern within the cochlea. Its movement stimulates cochlear hair cells, linking physical vibration to cellular activity. This step is essential because the auditory pathway cannot transmit sound information until hair cells convert that mechanical input into electrical signals for subsequent encoding.
Cochlear hair cells and spiral ganglion neurons contribute at different stages. Hair cells convert mechanical vibrations into electrical signals, while spiral ganglion neurons encode those signals as action potentials. The action potentials provide the neural form of the information carried through the auditory nerve, allowing the signal to reach the brainstem.
The pathway provides a framework for locating different causes of hearing loss. Conductive problems affect sound transmission before the cochlea, cochlear problems involve the inner-ear sensory structures, and neural problems involve signal transmission beyond those structures. Hearing tests can help clinicians distinguish these categories and determine which part of the pathway may be affected.
Pure-tone audiometry is one of the clinical tools used to assess hearing-related function. Its results can contribute to distinguishing conductive, cochlear, and neural causes of hearing loss when considered alongside other evaluations. In medicine, this helps organize the diagnostic assessment rather than treating all reduced hearing as a single type of problem.
Auditory brainstem responses evaluate activity associated with sound-related signaling as it reaches the brainstem. Because the auditory nerve carries action potentials toward this region, the test can provide information about neural transmission in the pathway. Clinicians use it with pure-tone audiometry and related tests to help investigate hearing disorders and their likely location.
Auditory nerve function is relevant to cochlear implant evaluation because successful assessment requires attention to the pathway that carries cochlear signals toward the brainstem. The same pathway also provides a framework for research into hearing disorders. Combining physiological understanding with hearing tests can support clinical decisions and investigation of where signaling becomes impaired.