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Related Concept Videos

Auditory Pathway01:15

Auditory Pathway

6.1K
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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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.
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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.
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Mechanically-gated Ion Channels01:12

Mechanically-gated Ion Channels

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Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
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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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Perceiving Loudness, Pitch, and Location01:21

Perceiving Loudness, Pitch, and Location

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The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by...
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Related Experiment Video

Updated: Oct 22, 2025

Auditory Brainstem Response and Outer Hair Cell Whole-cell Patch Clamp Recording in Postnatal Rats
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Transient Receptor Potential Channels and Auditory Functions.

Vickram Ramkumar1, Sandeep Sheth2, Asmita Dhukhwa1

  • 1Department of Pharmacology, Southern Illinois University School of Medicine, Springfield, Illinois, USA.

Antioxidants & Redox Signaling
|September 1, 2021
PubMed
Summary

Transient receptor potential (TRP) channels in the cochlea are involved in sensory perception and hearing. Research shows TRPV1 channels respond to stressors, influencing cell death and protection, offering potential for new hearing loss treatments.

Keywords:
NADPH oxidasescochleacytokinesfree radicalshearing lossinflammationnitric oxideototoxicityreceptorstranscription factors

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Area of Science:

  • Auditory Neuroscience
  • Molecular Biology
  • Ototoxicity Research

Background:

  • Transient receptor potential (TRP) channels are sensory detectors found in the inner ear, potentially involved in auditory perception.
  • Their precise role in normal cochlear physiology and response to stressors like ototoxic drugs and noise is under investigation.

Purpose of the Study:

  • To review the types, distribution, regulation, and function of TRP channels in the cochlea.
  • To explore the role of TRPV1 channels in cochlear stress responses, inflammation, and ototoxicity.
  • To discuss the potential of TRP channels in developing novel otoprotective strategies.

Main Methods:

  • Literature review of studies on TRP channel expression and function in the cochlea.
  • Analysis of research on TRPV1 channel regulation by oxidative stress and transcription factors (STAT1, STAT3).
  • Examination of TRPV1 channel involvement in responses to capsaicin, cisplatin, and aminoglycosides.

Main Results:

  • TRP channels contribute to hair cell mechanoelectrical transduction and strial functions.
  • TRPV1 channels are responsive to cochlear stressors, influencing cytoprotective and cell death pathways.
  • TRPV1 is crucial for cisplatin ototoxicity, while capsaicin pre-treatment can be protective.

Conclusions:

  • TRPV1 channel activity is modulated by oxidative stress and transcription factors, impacting cochlear inflammation and apoptosis.
  • TRPV1 mediates aminoglycoside entry into hair cells, suggesting it as a target for otoprotection.
  • Further research into TRP channel function in the cochlea could lead to new treatments for hearing loss.