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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 Auditory Ossicles01:11

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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.
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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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The auditory system is essential for sound perception, utilizing various critical structures. When sound waves enter the outer ear, they travel through the ear canal and cause the eardrum to vibrate. These vibrations are then transmitted to the middle ear, where three tiny bones – the malleus, incus, and stapes – amplify the sound. This amplification is crucial, as it ensures that the sound vibrations are strong enough to be conveyed to the inner ear. These vibrations then reach the...
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The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...
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The information-processing theory of cognitive development centers on fundamental mental processes, including attention, memory, and problem-solving skills. Researchers in this field examine how cognitive abilities, such as working memory, evolve and influence children's overall development. Studies indicate that children with stronger working memory tend to excel in reading comprehension, math, and problem-solving compared to peers with less efficient memory skills. Low working memory is...
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Related Experiment Video

Updated: Feb 6, 2026

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
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Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages

Published on: March 24, 2023

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Connexin 43 and hearing: possible implications for retrocochlear auditory processing.

Ana H Kim1, Edmund Nahm, Anne Sollas

  • 1Department of Otolaryngology, New York Eye and Ear Infirmary, New York; New York Medical College, Valhalla, New York.

The Laryngoscope
|July 3, 2013
PubMed
Summary
This summary is machine-generated.

Mice with a connexin 43 (CX43) mutation showed significant hearing loss compared to controls. CX43 is abundant in the retrocochlear auditory centers, suggesting a role beyond hair cell function.

Keywords:
Connexin 43hearing lossretrocochlear auditory pathway

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Area of Science:

  • Neuroscience
  • Auditory Neuroscience
  • Genetics

Background:

  • Connexin 43 (CX43) is a major gap junction protein in the central nervous system.
  • Gap junctions play critical roles in cellular communication within the auditory pathway.

Purpose of the Study:

  • To investigate the relationship between connexin 43 and hearing function.
  • To assess the impact of connexin 43 mutations on auditory pathways.

Main Methods:

  • Utilized connexin 43 heterozygous mice to study hearing.
  • Assessed hearing using auditory brainstem response and distortion product otoacoustic emissions.
  • Examined connexin 43 distribution in the organ of Corti and retrocochlear auditory centers.

Main Results:

  • Connexin 43 heterozygous mice exhibited elevated auditory brainstem response thresholds compared to controls.
  • Hearing loss worsened with age in the heterozygous mice.
  • Connexin 43 was predominantly found in retrocochlear auditory centers, not the organ of Corti.

Conclusions:

  • Connexin 43 heterozygous mice demonstrate significant hearing impairment.
  • The hearing loss mechanism is not linked to hair cell degeneration.
  • Connexin 43 is crucial for auditory pathway function in the retrocochlear centers.