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関連する概念動画

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.
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.
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...
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...
Hearing01:31

Hearing

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.
Postsynaptic Potential (PSP)01:32

Postsynaptic Potential (PSP)

Postsynaptic potential (PSP) refers to a change in the electrical potential of a neuron when neurotransmitters released by presynaptic neurons bind to postsynaptic receptors. This potential can either be excitatory, leading to depolarization and ultimately action potential generation, or inhibitory, leading to hyperpolarization and suppression of the postsynaptic neuron.
There are two types of receptors: ionotropic and metabotropic.
The ionotropic receptor is the membrane protein that has an...

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関連する実験動画

Updated: Jun 19, 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

タイプIIの耳アフェレンツのポストシナプス機能

Catherine Weisz1, Elisabeth Glowatzki, Paul Fuchs

  • 1The Department of Neuroscience, The Center for Hearing and Balance and the Center for Sensory Biology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA.

Nature
|October 23, 2009
PubMed
まとめ
この要約は機械生成です。

以前は十分に理解されていなかった2型頭神経は,聴覚アフェレンツであることが証明されています. 彼らは強い音とATPに反応し,タイプIニューロンと比べて聴覚において明確な役割を果たしていることを示唆しています.

さらに関連する動画

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

Auditory Brainstem Response and Outer Hair Cell Whole-cell Patch Clamp Recording in Postnatal Rats
09:23

Auditory Brainstem Response and Outer Hair Cell Whole-cell Patch Clamp Recording in Postnatal Rats

Published on: May 24, 2018

関連する実験動画

Last Updated: Jun 19, 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

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

Auditory Brainstem Response and Outer Hair Cell Whole-cell Patch Clamp Recording in Postnatal Rats
09:23

Auditory Brainstem Response and Outer Hair Cell Whole-cell Patch Clamp Recording in Postnatal Rats

Published on: May 24, 2018

科学分野:

  • 神経科学は神経科学である.
  • 監査システム研究 監査システム研究
  • 細胞生物学 細胞生物学

背景:

  • 哺乳類のコクレアには,タイプI (90-95%) とタイプIIの2種類の感覚神経細胞があります.
  • タイプIニューロンは,音響分析のために内部の毛細胞を神経化します.
  • 希少で研究されていないII型ニューロンは,外側の毛細胞とサポート細胞を内化します.

研究 の 目的:

  • タイプII耳神経細胞の機能とシナプス入力について研究する.
  • 音声刺激とATPに対するII型ニューロンの反応を決定する.
  • 聴覚信号伝達におけるII型ニューロンの役割を明らかにする.

主な方法:

  • 外部毛細胞の近くのタイプIIニューロン繊維からの電気生理学的記録.
  • ニューロンの脱極化を評価するために,外因的なATPの適用.
  • 型IIニューロンにおけるシナプス入力とアクションポテンシャル伝導の分析.

主要な成果:

  • II型ニューロンは,刺激性グルタマタージックシナプス入力を受けます.
  • グルタマタージック刺激には,強い音響刺激が必要です.
  • II型ニューロンは,直接または誘発されたグルタマタージック入力を通じて,ATPによって脱極化されます.
  • II型ニューロンのシナプス駆動は,I型アファレントよりも小さい.

結論:

  • II型ニューロンは,頭アフェレンツとして機能する.
  • II型ニューロンはATPによって調節される.
  • タイプIIニューロンは,その独特の応答特性により,タイプIアファレントと比較して,異なる聴覚信号伝達役割を持っています.