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Related Concept Videos

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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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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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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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...
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Related Experiment Video

Updated: Sep 9, 2025

Dextran Labeling and Uptake in Live and Functional Murine Cochlear Hair Cells
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Dextran Labeling and Uptake in Live and Functional Murine Cochlear Hair Cells

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Tectorial membrane: structure, function, and its implications for hearing loss.

Panpan Bian1, Jiong Dang1, Bai-Cheng Xu1

  • 1Department of Otolaryngology-Head & Neck Surgery, The Second Hospital & Clinical Medical School, Lanzhou University, Lanzhou, Gansu, China.

Frontiers in Neurology
|September 3, 2025
PubMed
Summary
This summary is machine-generated.

The tectorial membrane (TM) is crucial for hearing. Disruptions in its structure, caused by genetics or aging, lead to hearing loss, but new therapies like gene therapy show promise.

Keywords:
agingcochleagenetic mutationshearing lossototoxicitytectorial membranethyroid hormone

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Area of Science:

  • Otolaryngology
  • Cell Biology
  • Genetics

Background:

  • The tectorial membrane (TM) is a vital extracellular matrix in the cochlea, essential for auditory processing.
  • Its precise role in cochlear mechanics and sound amplification is critical for hearing.
  • Mechanisms underlying tectorial membrane-related hearing loss are not fully understood.

Purpose of the Study:

  • To review the structure and function of the tectorial membrane.
  • To explore the TM's role in cochlear mechanics and auditory signal amplification.
  • To discuss factors contributing to TM dysfunction and potential therapeutic strategies.

Main Methods:

  • Literature review of studies on tectorial membrane structure, function, and hearing loss.
  • Analysis of genetic factors, aging, and hormonal influences on TM integrity.
  • Examination of current and emerging diagnostic and therapeutic approaches.

Main Results:

  • Abnormalities in TM composition (collagen, glycosaminoglycans, proteins) are linked to hearing loss.
  • Mutations in genes like TECTA, TECTB, and CEACAM16 disrupt TM integrity, causing sensorineural hearing loss.
  • Aging and thyroid hormone deficiency contribute to TM degeneration.

Conclusions:

  • Tectorial membrane integrity is fundamental for normal hearing.
  • Genetic mutations, aging, and hormonal imbalances significantly impact TM structure and function.
  • Gene therapy and stem cell therapy represent promising future treatments for TM-related hearing loss.