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Related Concept Videos

Auditory Pathway01:15

Auditory Pathway

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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...
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Hearing01:31

Hearing

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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.
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Hair Cells01:22

Hair Cells

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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.
36.1K
The Cochlea01:13

The Cochlea

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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.
41.0K
Anatomy of the Ear01:16

Anatomy of the Ear

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Auditory sensation, commonly called hearing, involves the transformation of sonic waves into neural impulses facilitated by the structures of the auditory organ. The prominent, flesh-like structure on the side of the head, called the auricle, directs sound waves towards the auditory canal. The auricle is often mislabeled as the pinna, a term more aligned with mobile structures like a feline's external ear. The auditory canal penetrates the cranium via the external auditory meatus of the...
11.3K
Auditory Perception01:17

Auditory Perception

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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...
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Related Experiment Video

Updated: Apr 28, 2026

Data Acquisition and Analysis In Brainstem Evoked Response Audiometry In Mice
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Data Acquisition and Analysis In Brainstem Evoked Response Audiometry In Mice

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Metabotropic glutamate receptors in auditory processing.

Y Lu1

  • 1Department of Anatomy and Neurobiology, College of Medicine, Northeast Ohio Medical University, Rootstown, OH 44272, USA.

Neuroscience
|June 10, 2014
PubMed
Summary
This summary is machine-generated.

Metabotropic glutamate receptors (mGluRs) play key modulatory roles in the auditory system, influencing neurotransmission and synaptic plasticity. Further in vivo research is needed to fully understand their functions in auditory processing.

Keywords:
auditory processingexcitotoxicitymGluRneuromodulationneurotransmissionsynaptic plasticity

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Last Updated: Apr 28, 2026

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Stereotactically-guided Ablation of the Rat Auditory Cortex, and Localization of the Lesion in the Brain
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Area of Science:

  • Neuroscience
  • Auditory Neuroscience

Background:

  • Glutamate is the primary excitatory neurotransmitter in the vertebrate brain.
  • Metabotropic glutamate receptors (mGluRs) modulate neuronal activity and are targets for treating brain disorders.

Purpose of the Study:

  • To review current research on the roles of mGluRs in the auditory system.
  • To identify knowledge gaps in the anatomical and physiological understanding of mGluRs in auditory pathways.

Main Methods:

  • Review of anatomical and physiological studies on mGluRs in auditory nuclei.
  • Focus on in vitro brain slice preparations and limited in vivo systems-level studies.

Main Results:

  • mGluR expression is well-characterized in the cochlear nucleus but less so in other auditory nuclei.
  • In vitro studies show mGluRs regulate neurotransmission, ionic balance, plasticity, and excitation-inhibition balance in auditory structures.
  • Few in vivo studies exist at the systems level for auditory processing.

Conclusions:

  • mGluRs are integral to auditory processing, affecting neurotransmission and plasticity.
  • Significant gaps remain in understanding mGluR function, particularly in vivo.
  • More basic research is required to elucidate the essential roles of mGluRs in the auditory system.