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Videos de Conceptos Relacionados

Hair Cells01:22

Hair Cells

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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.
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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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Unrenewable Cells00:50

Unrenewable Cells

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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...
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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...
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Video Experimental Relacionado

Updated: Feb 26, 2026

Dextran Labeling and Uptake in Live and Functional Murine Cochlear Hair Cells
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Supresión de dos tonos en células ciliadas cocleares

P M Sellick1, I J Russell

  • 1Ethology and Neurophysiology Group, Department of Biology, University of Sussex, Brighton BN1 9QG, U.K.

Hearing research
|February 25, 2026
PubMed
Resumen

La supresión de dos tonos, observada previamente en el nervio auditivo, también ocurre en los potenciales receptores de las células ciliadas internas. Este hallazgo revela un nuevo nivel en el que ocurre el procesamiento auditivo en la cóclea.

Palabras clave:
Supresión de dos tonosCélulas ciliadas internasPotencial receptorProcesamiento auditivoNeurociencia auditiva

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Área de la Ciencia:

  • Neurociencia auditiva
  • Neurofisiología
  • Biología sensorial

Sus antecedentes:

  • La supresión de dos tonos es un fenómeno conocido en el procesamiento auditivo.
  • Se ha documentado previamente a nivel del nervio auditivo.

Objetivo del estudio:

  • Investigar la ocurrencia de supresión de dos tonos en las células ciliadas internas.
  • Determinar si este fenómeno está presente a nivel del potencial receptor en la cóclea.

Principales métodos:

  • Registros electrofisiológicos de células ciliadas internas únicas.
  • Experimentos realizados en el primer giro de la cóclea de la cobaya.

Principales resultados:

  • Se observó supresión de dos tonos en el potencial receptor de células ciliadas internas únicas.
  • Esto indica que el fenómeno se extiende al nivel de las células ciliadas.

Conclusiones:

  • La supresión de dos tonos ocurre no solo en el nervio auditivo sino también dentro de las células ciliadas internas.
  • Esto sugiere un procesamiento más complejo de la información auditiva a nivel del receptor de lo que se entendía previamente.