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Related Concept Videos

Auditory Pathway01:15

Auditory Pathway

Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking the...
Hearing01:31

Hearing

When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.
The Cochlea01:13

The Cochlea

The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
Auditory Perception01:17

Auditory Perception

The auditory system is essential for sound perception, utilizing various critical structures. When sound waves enter the outer ear, they travel through the ear canal and cause the eardrum to vibrate. These vibrations are then transmitted to the middle ear, where three tiny bones – the malleus, incus, and stapes – amplify the sound. This amplification is crucial, as it ensures that the sound vibrations are strong enough to be conveyed to the inner ear. These vibrations then reach the cochlea, a...
Hair Cells01:22

Hair Cells

Hair cells are the sensory receptors of the auditory system—they transduce mechanical sound waves into electrical energy that the nervous system can understand. Hair cells are located in the organ of Corti within the cochlea of the inner ear, between the basilar and tectorial membranes. The actual sensory receptors are called inner hair cells. The outer hair cells serve other functions, such as sound amplification in the cochlea, and are not discussed in detail here.

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Related Experiment Video

Updated: Jun 3, 2026

Optogenetic Stimulation of the Auditory Nerve
10:53

Optogenetic Stimulation of the Auditory Nerve

Published on: October 8, 2014

[Stimulation-dependent gene expression in the central auditory system].

T F Jakob1

  • 1Universitätsklinik für Hals-, Nasen- und Ohrenheilkunde Freiburg, Killianstraße 5, 79106, Freiburg, Deutschland. till.jakob@uniklinik-freiburg.de

HNO
|March 23, 2011
PubMed
Summary
This summary is machine-generated.

Electrical stimulation of the auditory system triggers rapid neuronal remodeling, indicated by immediate early gene (IEG) expression like c-Fos. Stimulation parameters influence neuroplasticity across auditory brain regions.

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Direct Visualization of the Murine Dorsal Cochlear Nucleus for Optogenetic Stimulation of the Auditory Pathway
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Direct Visualization of the Murine Dorsal Cochlear Nucleus for Optogenetic Stimulation of the Auditory Pathway

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Behavioral Determination of Stimulus Pair Discrimination of Auditory Acoustic and Electrical Stimuli Using a Classical Conditioning and Heart-rate Approach
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Behavioral Determination of Stimulus Pair Discrimination of Auditory Acoustic and Electrical Stimuli Using a Classical Conditioning and Heart-rate Approach

Published on: June 6, 2012

Related Experiment Videos

Last Updated: Jun 3, 2026

Optogenetic Stimulation of the Auditory Nerve
10:53

Optogenetic Stimulation of the Auditory Nerve

Published on: October 8, 2014

Direct Visualization of the Murine Dorsal Cochlear Nucleus for Optogenetic Stimulation of the Auditory Pathway
07:58

Direct Visualization of the Murine Dorsal Cochlear Nucleus for Optogenetic Stimulation of the Auditory Pathway

Published on: January 20, 2015

Behavioral Determination of Stimulus Pair Discrimination of Auditory Acoustic and Electrical Stimuli Using a Classical Conditioning and Heart-rate Approach
10:50

Behavioral Determination of Stimulus Pair Discrimination of Auditory Acoustic and Electrical Stimuli Using a Classical Conditioning and Heart-rate Approach

Published on: June 6, 2012

Area of Science:

  • Neuroscience
  • Auditory System Research
  • Molecular Biology

Context:

  • Neuronal remodeling in the central auditory system is initiated by sensory stimulation.
  • Immediate early genes (IEGs), such as c-fos, are key indicators of this activity-dependent plasticity.
  • Understanding these early changes is crucial for deciphering auditory system function.

Purpose:

  • To investigate activity-dependent neuroplasticity in the central auditory system using electrical intracochlear stimulation (EIS) in a rat model.
  • To determine how stimulation parameters (laterality, intensity, frequency) affect neuronal activity and gene expression.
  • To map the unique patterns of c-Fos expression across different auditory nuclei.

Summary:

  • Acute unilateral electrical intracochlear stimulation (EIS) was applied to rats to study neuroplasticity.
  • Researchers analyzed the expression of the immediate early gene c-Fos in various auditory nuclei: ventral and dorsal cochlear nucleus (VCN and DCN), lateral superior olive (LSO), central inferior colliculus (CIC), and medial geniculate body (MGB).
  • Distinct c-Fos expression patterns were observed in each region, demonstrating region-specific responses to electrical stimulation.

Impact:

  • This study reveals that auditory system stimulation induces rapid, region-specific neuroplastic changes.
  • The findings highlight the differential impact of stimulation parameters on neuronal populations within the central auditory pathway.
  • Provides a foundation for understanding how artificial stimulation can modulate auditory processing and potentially treat hearing impairments.