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Related Concept Videos

Anatomy of the Ear01:16

Anatomy of the Ear

10.6K
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...
10.6K
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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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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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...
6.7K
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
Hair Cells01:22

Hair Cells

43.8K
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.
43.8K

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Related Experiment Video

Updated: Dec 5, 2025

Simple Surgical Induction of Conductive Hearing Loss with Verification Using Otoscope Visualization and Behavioral Clap Startle Response in Rat
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Simple Surgical Induction of Conductive Hearing Loss with Verification Using Otoscope Visualization and Behavioral Clap Startle Response in Rat

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[Conductive hearing loss with a normal eardrum].

Stanislas Ballivet de Régloix1, Olga Maurin2, Renaud Derkenne1

  • 1Service d'ORL et de chirurgie cervico-faciale, Hôpital d'instruction des armées Laveran, Marseille, France.

La Revue Du Praticien
|October 15, 2020
PubMed
Summary
This summary is machine-generated.

Conductive hearing loss with a normal eardrum stems from sound transmission issues. Early diagnosis and CT scans are crucial for effective treatment and managing socio-professional impacts.

Keywords:
Conductive hearing loss

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Modified Experimental Conditions for Noise-Induced Hearing Loss in Mice and Assessment of Hearing Function and Outer Hair Cell Damage
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Area of Science:

  • Otolaryngology
  • Medical Imaging

Background:

  • Conductive hearing loss with a normal eardrum involves impaired sound transmission despite an intact eardrum and cochlear nerve.
  • This condition is frequent, has significant socio-professional consequences, and is often treatable surgically or with hearing aids.

Purpose of the Study:

  • To detail the diagnostic approach for conductive hearing loss with a normal eardrum.
  • To highlight the role of CT scans in diagnosis and preoperative assessment.
  • To review the causes, including middle ear pathologies and inner ear abnormalities.

Main Methods:

  • Review of anatomical structures of the tympano-ossicular system.
  • Discussion of diagnostic, differential, and etiological considerations.
  • Emphasis on the contribution of modern digital imaging, particularly CT scans.

Main Results:

  • Otosclerosis and other middle ear pathologies are common causes.
  • Advances in digital imaging have identified inner ear abnormalities as potential causes of conductive or mixed hearing loss.
  • CT scans are vital for diagnostic orientation and surgical planning.

Conclusions:

  • Accurate diagnosis of conductive hearing loss with a normal eardrum is essential due to its prevalence and impact.
  • CT imaging plays a pivotal role in identifying underlying pathologies.
  • A comprehensive understanding of tympano-ossicular anatomy and pathologies is necessary for effective management.