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Related Concept Videos

Hair Cells01:22

Hair Cells

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.
Auditory Pathway01:15

Auditory Pathway

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 the...
The Cochlea01:13

The Cochlea

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.
Anatomy of the Ear01:16

Anatomy of the Ear

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...
Unrenewable Cells00:50

Unrenewable Cells

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 their outer...
Electrical Synapses01:28

Electrical Synapses

Electrical synapses found in all nervous systems play important and unique roles. In these synapses, the presynaptic and postsynaptic membranes are very close together (3.5 nm) and are actually physically connected by channel proteins forming gap junctions.
Gap junctions allow the current to pass directly from one cell to the next. In contrast, in the chemical synapse, the neurotransmitters carry the information through the synaptic cleft from one neuron to the next. They consist of two...

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Related Experiment Video

Updated: Jun 30, 2026

Postsynaptic Recordings at Afferent Dendrites Contacting Cochlear Inner Hair Cells: Monitoring Multivesicular Release at a Ribbon Synapse
11:45

Postsynaptic Recordings at Afferent Dendrites Contacting Cochlear Inner Hair Cells: Monitoring Multivesicular Release at a Ribbon Synapse

Published on: February 10, 2011

Hair cell afferent synapses.

Elisabeth Glowatzki1, Lisa Grant, Paul Fuchs

  • 1Department of Otolaryngology, Johns Hopkins School of Medicine, 720 Rutland Avenue, Ross 824, Baltimore, MD 21205, United States. eglowat1@jhmi.edu

Current Opinion in Neurobiology
|October 1, 2008
PubMed
Summary
This summary is machine-generated.

Recent advances refined understanding of hair cell afferent synaptic function, revealing surprising properties. Research explored vesicle fusion, trafficking, and signaling in auditory neuropathy using mouse models.

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Combined Recording of Mechanically Stimulated Afferent Output and Nerve Terminal Labelling in Mouse Hair Follicle Lanceolate Endings
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Combined Recording of Mechanically Stimulated Afferent Output and Nerve Terminal Labelling in Mouse Hair Follicle Lanceolate Endings

Published on: May 7, 2016

Morphological and Functional Evaluation of Ribbon Synapses at Specific Frequency Regions of the Mouse Cochlea
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Morphological and Functional Evaluation of Ribbon Synapses at Specific Frequency Regions of the Mouse Cochlea

Published on: May 10, 2019

Related Experiment Videos

Last Updated: Jun 30, 2026

Postsynaptic Recordings at Afferent Dendrites Contacting Cochlear Inner Hair Cells: Monitoring Multivesicular Release at a Ribbon Synapse
11:45

Postsynaptic Recordings at Afferent Dendrites Contacting Cochlear Inner Hair Cells: Monitoring Multivesicular Release at a Ribbon Synapse

Published on: February 10, 2011

Combined Recording of Mechanically Stimulated Afferent Output and Nerve Terminal Labelling in Mouse Hair Follicle Lanceolate Endings
13:04

Combined Recording of Mechanically Stimulated Afferent Output and Nerve Terminal Labelling in Mouse Hair Follicle Lanceolate Endings

Published on: May 7, 2016

Morphological and Functional Evaluation of Ribbon Synapses at Specific Frequency Regions of the Mouse Cochlea
09:54

Morphological and Functional Evaluation of Ribbon Synapses at Specific Frequency Regions of the Mouse Cochlea

Published on: May 10, 2019

Area of Science:

  • Neuroscience
  • Otolaryngology
  • Genetics

Background:

  • The hair cell afferent synapse is crucial for auditory neurotransmission.
  • Understanding its function is key to addressing hearing loss.
  • Previous research laid the groundwork for advancements in synaptic physiology.

Purpose of the Study:

  • To review key advancements in hair cell afferent synaptic function between 2005 and 2008.
  • To highlight new insights into vesicle dynamics and synaptic transmission.
  • To explore the genetic basis of auditory neuropathy and its impact on afferent signaling.

Main Methods:

  • Refined capacitance measurements to study vesicular fusion.
  • Utilized optical methods to investigate vesicle trafficking.
  • Employed paired intracellular recordings for high-resolution synaptic transfer function analysis.
  • Identified genes associated with auditory neuropathy and studied their role in mouse models.

Main Results:

  • Capacitance measurements and optical methods provided greater detail on vesicle fusion and trafficking.
  • High-resolution recordings elucidated the afferent synapse's transfer function.
  • Genetic studies linked specific genes to auditory neuropathy and afferent signaling defects.
  • These findings revealed novel and complex properties of the hair cell afferent synapse.

Conclusions:

  • Significant progress was made in understanding hair cell afferent synaptic function from 2005-2008.
  • The synapse exhibits unique properties critical for neural function.
  • Advances in techniques and genetic research have deepened our knowledge of hearing mechanisms and disorders.
  • This review synthesizes key findings, emphasizing the synapse's specialized role.