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Related Concept Videos

The Cochlea01:13

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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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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 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.
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Related Experiment Video

Updated: Dec 25, 2025

Cryosectioning and Immunostaining Mouse Inner Ear Tissue: From Embryonic to Adult Stages
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Cochlear Dysfunction in Chronic Otitis Media and Its Determinants.

Vijayalakshmi Subramaniam1, Ali Ashkar2, Sheetal Rai1

  • 1Department of Otorhinolaryngology, Yenepoya Medical College, Mangalore city, Karnataka State, India.

Iranian Journal of Otorhinolaryngology
|March 29, 2020
PubMed
Summary
This summary is machine-generated.

Chronic suppurative otitis media (CSOM) can lead to sensorineural hearing loss (SNHL), especially with longer disease duration and larger perforations. Early treatment and reconstruction are key to reducing SNHL risk.

Keywords:
Chronic otitis mediaCochlearSensorineural hearing loss

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Area of Science:

  • Otolaryngology
  • Audiology
  • Medical Research

Background:

  • Chronic otitis media (COM) is a prevalent condition that can result in sensorineural hearing loss (SNHL).
  • Untreated COM poses a risk for developing the sensorineural component of hearing impairment.
  • Understanding the factors contributing to SNHL in COM is crucial for patient counseling.

Purpose of the Study:

  • To evaluate factors influencing the sensorineural component in chronic suppurative otitis media (CSOM).
  • To provide counseling information to patients regarding SNHL risk associated with untreated CSOM.
  • To identify specific disease characteristics that correlate with SNHL development.

Main Methods:

  • A cross-sectional study involving 137 patients with CSOM and 137 controls.
  • Hearing assessment using pure tone audiometry and special hearing tests.
  • Data collection on disease duration, perforation type (pars flaccida vs. pars tensa), and perforation size.

Main Results:

  • Sensorineural hearing loss (SNHL) was observed in 71.4% of CSOM cases with over 5 years of ear discharge.
  • SNHL prevalence was 55.2% for pars flaccida and 44.7% for pars tensa perforations.
  • Larger pars tensa perforation size and subtotal/total perforations significantly increased SNHL risk.

Conclusions:

  • Longer disease duration, squamous disease type, and larger pars tensa perforations increase susceptibility to SNHL.
  • Eradicating middle ear disease and early hearing mechanism reconstruction can mitigate SNHL burden.
  • Timely intervention in CSOM is vital for preserving hearing function.