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Related Concept Videos

The Cochlea01:13

The Cochlea

50.6K
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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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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Auditory Pathway01:15

Auditory Pathway

7.1K
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

44.4K
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.
44.4K
The Auditory Ossicles01:11

The Auditory Ossicles

3.0K
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...
3.0K

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Related Experiment Video

Updated: Jan 18, 2026

The Miniature Pig: A Large Animal Model for Cochlear Implant Research
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The Miniature Pig: A Large Animal Model for Cochlear Implant Research

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How compartments talk: Compartment coupling guides cochlear development.

Ippei Kishimoto1, Alan G Cheng1

  • 1Otolaryngology-Head & Neck Surgery, Stanford University School of Medicine, Stanford, California, United States of America.

Plos Biology
|September 10, 2025
PubMed
Summary
This summary is machine-generated.

Morphogens guide inner ear cochlea development by coordinating communication between cellular compartments. This study reveals how planar cell polarity integrates signals across regions for proper organ formation.

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Related Experiment Videos

Last Updated: Jan 18, 2026

The Miniature Pig: A Large Animal Model for Cochlear Implant Research
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Area of Science:

  • Developmental Biology
  • Cell Biology
  • Organogenesis

Background:

  • Morphogens are crucial signaling molecules directing embryonic development.
  • The inner ear cochlea's formation involves complex cellular interactions.
  • Understanding inter-compartmental communication is key to developmental processes.

Purpose of the Study:

  • To investigate how distinct regional compartments communicate during inner ear cochlea development.
  • To elucidate the role of planar cell polarity in integrating signals across these compartments.
  • To understand the mechanisms ensuring proper organ morphogenesis.

Main Methods:

  • Utilized advanced imaging techniques to visualize cellular behavior.
  • Employed genetic manipulation to study specific signaling pathways.
  • Analyzed cell polarity dynamics within different cochlear regions.

Main Results:

  • Demonstrated that planar cell polarity is coordinated across regional compartments.
  • Identified specific molecular mechanisms linking cell polarity to inter-compartmental communication.
  • Showcased how this integration is essential for cochlear tube formation.

Conclusions:

  • Planar cell polarity acts as a crucial integrator of information across distinct cellular compartments in the developing cochlea.
  • This mechanism ensures coordinated cellular behavior necessary for proper inner ear morphogenesis.
  • The findings provide new insights into developmental signaling and organ formation.