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Related Concept Videos

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

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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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Perception of Sound Waves01:01

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The human ear is not equally sensitive to all frequencies in the audible range. It may perceive sound waves with the same pressure but different frequencies as having different loudness. Moreover, the perception of sound waves depends on the health of an individual's ears, which decays with age. The health of one's ears may also be affected by regular exposure to loud noises.
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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 human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
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Related Experiment Video

Updated: Apr 28, 2026

Neuro-rehabilitation Approach for Sudden Sensorineural Hearing Loss
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Imaging of hearing loss.

Lubdha M Shah1, Richard H Wiggins

  • 1Department of Radiology, University of Utah Health Care, Salt Lake City, UT 84132-2140, USA. lubdha.shah@hsc.utah.edu

Neuroimaging Clinics of North America
|September 8, 2009
PubMed
Summary

This review categorizes hearing loss causes into conductive, sensorineural, and mixed types, covering both congenital and acquired conditions. It details imaging findings of pathologies from the ear canal to the midbrain.

Area of Science:

  • Otolaryngology
  • Radiology
  • Medical Imaging

Background:

  • Hearing loss is a significant global health issue with diverse etiologies.
  • Pathologies affecting auditory pathways range from congenital malformations to acquired conditions.
  • Accurate diagnosis relies on understanding the anatomical progression of auditory structures.

Purpose of the Study:

  • To systematically review common causes of hearing loss.
  • To classify pathologies into conductive, sensorineural, and mixed hearing loss.
  • To correlate pathologies with characteristic imaging findings along the auditory pathway.

Main Methods:

  • Literature review of common hearing loss etiologies.
  • Classification of pathologies based on type (conductive, sensorineural, mixed) and onset (congenital, acquired).

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  • Systematic analysis of imaging findings from the external auditory canal to the midbrain.

    • Main Results:

    • Common entities causing hearing loss are categorized.
    • Pathologies are presented in an organized manner from external to internal auditory structures.
    • Key imaging findings for various hearing loss pathologies are highlighted.

    Conclusions:

    • A structured approach to understanding hearing loss is presented.
    • Imaging plays a crucial role in diagnosing the underlying causes of hearing loss.
    • This review provides a framework for radiologists and clinicians evaluating auditory pathway pathologies.