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Related Concept Videos

The Cochlea01:13

The Cochlea

49.8K
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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Auditory Pathway01:15

Auditory Pathway

6.8K
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.
44.0K
Anatomy of the Ear01:16

Anatomy of the Ear

10.7K
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...
10.7K
The Auditory Ossicles01:11

The Auditory Ossicles

2.7K
The auditory ossicles of the middle ear transmit sounds from the air as vibrations to the fluid-filled cochlea. The auditory ossicles consist of two malleus (hammer) bones, two incus (anvil) bones, and two stapes (stirrups), one on each side. These bones develop during the fetal stage and are the ones to ossify first. They are fully mature at birth and do not grow afterward.
The aptly named stapes look very much like a stirrup. The three ossicles are unique to mammals, and each plays a role in...
2.7K
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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Related Experiment Video

Updated: Dec 17, 2025

In Ovo and Ex Ovo Methods to Study Avian Inner Ear Development
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In Ovo and Ex Ovo Methods to Study Avian Inner Ear Development

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Development of the cochlea.

Elizabeth Carroll Driver1, Matthew W Kelley2

  • 1Laboratory of Cochlear Development, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD 20892, USA.

Development (Cambridge, England)
|June 24, 2020
PubMed
Summary
This summary is machine-generated.

This review details cochlear development, focusing on the organ of Corti's formation. Precise signaling pathways are crucial for auditory sensory epithelium development and function.

Keywords:
Atoh1DeafnessHearingNotchOrgan of CortiRadial intercalation

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Area of Science:

  • Developmental biology
  • Neuroscience
  • Otolaryngology

Background:

  • The cochlea is essential for hearing, housing the organ of Corti.
  • The organ of Corti converts sound into neural signals.
  • Its development involves complex patterning along three axes.

Purpose of the Study:

  • To review recent studies on cochlear development.
  • To highlight cellular and molecular processes involved.
  • To emphasize the role of signaling pathways in organ of Corti formation.

Main Methods:

  • Review of existing scientific literature.
  • Analysis of cellular and molecular mechanisms.
  • Focus on signaling pathways in development.

Main Results:

  • Cochlear development requires inductive events for cell specification.
  • Axial patterning, outgrowth, and differentiation are key processes.
  • Multiple signaling pathways must be precisely coordinated.

Conclusions:

  • Successful organ of Corti formation depends on coordinated signaling.
  • Understanding these processes is vital for auditory development research.
  • Further research can elucidate mechanisms for treating hearing loss.