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Related Concept Videos

Auditory Pathway01:15

Auditory Pathway

4.6K
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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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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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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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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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...
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Unrenewable Cells00:50

Unrenewable Cells

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In humans, the photoreceptor cells of the eye and sensory hair cells of the ear lack stem cells. These cells are thus unrenewable and cannot be replaced when they are damaged or destroyed.
Photoreceptors
The retina is composed of several layers and contains specialized cells called photoreceptors. The photoreceptors (rods and cones) change their membrane potential when stimulated by light energy. There are two types of photoreceptors—rods and cones—which differ in the shape of...
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Related Experiment Video

Updated: May 26, 2025

Morphological and Functional Evaluation of Ribbon Synapses at Specific Frequency Regions of the Mouse Cochlea
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Morphological and Functional Evaluation of Ribbon Synapses at Specific Frequency Regions of the Mouse Cochlea

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Checkerboard cellular pattern in auditory epithelia: Implications for auditory function and sensory pathology.

Hideru Togashi1

  • 1Laboratory of Molecular Pharmacology, Biosignal Research Center, Kobe University, Kobe 657-8501, Japan.

Hearing Research
|February 21, 2025
PubMed
Summary

The unique checkerboard arrangement of auditory hair and supporting cells is vital for hearing. Disrupting this pattern causes hair cell death and deafness, highlighting its importance in auditory function.

Keywords:
Adherens junctionChecker-board patternHearing lossNeuron-glial cell interactionOrgan of cortiTight junction

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Related Experiment Videos

Last Updated: May 26, 2025

Morphological and Functional Evaluation of Ribbon Synapses at Specific Frequency Regions of the Mouse Cochlea
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Cochlear Surface Preparation in the Adult Mouse
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Area of Science:

  • Auditory Neuroscience
  • Cell Biology
  • Developmental Biology

Background:

  • Sensory epithelia rely on precise cellular arrangements for function.
  • The organ of Corti's auditory epithelium exhibits a conserved checkerboard pattern of hair and supporting cells.
  • This pattern prevents direct hair cell contact, crucial for epithelial integrity.

Purpose of the Study:

  • To review the physiological significance of the auditory epithelium's checkerboard pattern.
  • To explore the consequences of disrupting this pattern on auditory function and hearing.
  • To understand the evolutionary basis and potential therapeutic implications of this cellular arrangement.

Main Methods:

  • Review of existing literature on auditory epithelium structure and function.
  • Analysis of studies investigating the effects of pattern disruption in animal models (e.g., mice).
  • Examination of molecular mechanisms underlying cell-cell interactions and apoptosis.

Main Results:

  • Disruption of the checkerboard pattern leads to hair cell apoptosis and deafness.
  • Abnormal adherens and tight junction formation contribute to structural fragility and cell death.
  • Direct hair cell contact triggers abnormal adhesion molecule accumulation and altered ion permeability.

Conclusions:

  • The checkerboard pattern is essential for maintaining auditory epithelial stability and function.
  • Its evolutionary conservation underscores its critical role in preventing hearing loss.
  • Understanding this pattern offers insights into hearing disorders and potential therapeutic strategies.