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Related Concept Videos

The Cochlea01:13

The Cochlea

45.7K
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.
45.7K
Auditory Pathway01:15

Auditory Pathway

5.6K
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...
5.6K
Hair Cells01:22

Hair Cells

41.1K
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.
41.1K
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.
52.9K
Perceiving Loudness, Pitch, and Location01:21

Perceiving Loudness, Pitch, and Location

395
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.
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by...
395
Unrenewable Cells00:50

Unrenewable Cells

2.3K
In humans, the photoreceptor cells of the eye and sensory hair cells of the ear lack stem cells. These cells are thus unrenewable and cannot be replaced when they are damaged or destroyed.
Photoreceptors
The retina is composed of several layers and contains specialized cells called photoreceptors. The photoreceptors (rods and cones) change their membrane potential when stimulated by light energy. There are two types of photoreceptors—rods and cones—which differ in the shape of...
2.3K

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Related Experiment Video

Updated: Aug 22, 2025

Author Spotlight: Advancements in Cultivating Mouse Hair Cells for Auditory Research
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Author Spotlight: Advancements in Cultivating Mouse Hair Cells for Auditory Research

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Genetic Hearing Loss Affects Cochlear Processing.

Cris Lanting1, Ad Snik1, Joop Leijendeckers1

  • 1Department of Otorhinolaryngology, Radboud University Medical Centre, Donders Institute for Brain, Cognition and Behaviour, Postbus 9101, 6500 HB Nijmegen, The Netherlands.

Genes
|November 11, 2022
PubMed
Summary
This summary is machine-generated.

Genetic hearing loss impairs cochlear processing, affecting speech recognition in noise. Loudness growth and spectral resolution are key biomarkers for understanding these genetic-related cochlear malfunctions.

Keywords:
frequency discriminationgap detectionhereditary hearing lossloudness growthotogeneticsspeech-in-noise

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Neuro-rehabilitation Approach for Sudden Sensorineural Hearing Loss
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Area of Science:

  • Audiology
  • Genetics
  • Otoacoustic Emissions

Background:

  • Hereditary hearing loss involves genetic defects impacting cochlear sound processing.
  • Speech recognition in noise is a critical measure of auditory function.

Purpose of the Study:

  • To investigate the relationship between genetic hearing loss and speech recognition in noise.
  • To identify cochlear processing aspects that correlate with speech understanding in genetically hearing-impaired individuals.

Main Methods:

  • Data from nine patient groups with specific genetic hearing loss types were analyzed.
  • Cochlear site-of-lesion was inferred from animal studies.
  • Speech recognition in noise scores were correlated with psychophysical measurements of supra-threshold cochlear processing.

Main Results:

  • Differences in speech perception in noise among patient groups were linked to cochlear processing factors.
  • Genetic-related cochlear malfunctioning was associated with impaired speech recognition in noise.
  • Loudness growth and spectral resolution emerged as significant predictors of speech understanding in noise.

Conclusions:

  • Speech recognition in noise is demonstrably affected by genetics-related cochlear dysfunction.
  • Loudness growth and spectral resolution serve as valuable biomarkers for assessing speech understanding deficits in genetic hearing loss.