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Related Concept Videos

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 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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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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The Auditory Ossicles01:11

The Auditory Ossicles

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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...
3.8K
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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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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Related Experiment Video

Updated: Mar 29, 2026

Performing Intracochlear Electrocochleography During Cochlear Implantation
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Development and Integration of the Ear.

Jennifer C Fuchs1, Abigail S Tucker1

  • 1Department of Craniofacial Development & Stem Cell Biology, King's College London, London, United Kingdom.

Current Topics in Developmental Biology
|November 22, 2015
PubMed
Summary

Proper development of the auditory system is vital for hearing. This review covers ear development, focusing on signaling pathways essential for integrating the external, middle, and inner ear structures.

Keywords:
External earIncusInner earMalleusManubriumMiddle earOval windowStapesTympanic membraneTympanic ring

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Area of Science:

  • Developmental Biology
  • Auditory Neuroscience
  • Otolaryngology

Background:

  • Hearing is a crucial sense for survival, social interaction, and learning.
  • The ear comprises external, middle, and inner components, each with distinct embryonic origins.
  • Proper development requires intricate spatiotemporal signaling for tissue integration.

Purpose of the Study:

  • To review current knowledge on the development of the three ear compartments.
  • To explore mechanisms and signaling pathways involved in ear structure coordination and integration.

Main Methods:

  • Review of existing literature on ear development.
  • Analysis of signaling pathways implicated in auditory system formation.

Main Results:

  • Ear development involves the integration of multiple tissues from different embryonic origins.
  • Spatiotemporal signaling is critical for establishing and maintaining functional connections within the auditory system.
  • Disruptions in development can lead to conductive or sensorineural hearing loss.

Conclusions:

  • Understanding ear development is key to addressing hearing impairments.
  • Further research into signaling pathways can elucidate mechanisms of auditory system formation and integration.