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相关概念视频

The Cochlea01:13

The Cochlea

44.8K
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.
44.8K
Hair Cells01:22

Hair Cells

40.3K
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.
40.3K
Auditory Pathway01:15

Auditory Pathway

5.4K
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...
5.4K

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相关实验视频

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Immunolabeling and Counting Ribbon Synapses in Young Adult and Aged Gerbil Cochleae
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Immunolabeling and Counting Ribbon Synapses in Young Adult and Aged Gerbil Cochleae

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耳丝带突触在老年小鹿中的突触

Sonny Bovee1, Georg M Klump1,2,3, Sonja J Pyott4

  • 1Department of Neuroscience, School of Medicine and Health Science, Carl von Ossietzky Universität Oldenburg, 26129 Oldenburg, Germany.

International journal of molecular sciences
|March 13, 2024
PubMed
概括
此摘要是机器生成的。

老化的耳朵显示了20%的听觉神经突触损失,主要影响高频耳部位置的低自发率纤维. 这表明,随着年龄的增长,听觉通路存在特定的漏洞.

关键词:
与年龄有关的听力损失.审计审计审计审计审计审计审计审计审计审计听觉神经是一种听觉神经.甲状腺 (cochlea) 是一种子 子 子 子听到 听到 听到 听到 听到 听到 听到内毛细胞的内部毛细胞.突触病 (synaptopathy) 是一种突触病.

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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

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

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Immunolabeling and Counting Ribbon Synapses in Young Adult and Aged Gerbil Cochleae
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Immunolabeling and Counting Ribbon Synapses in Young Adult and Aged Gerbil Cochleae

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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

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

  • 神经科学是一个神经科学.
  • 听觉神经科学 听觉神经科学
  • 老年学是一门学科.

背景情况:

  • 哺乳动物的听力依赖于通过带状突触连接到内部毛细胞的I型 afferent听觉神经纤维.
  • 听觉神经纤维在自发速率和突触位置 (模块侧与柱侧) 上有所不同.
  • 与年龄相关的变化和噪声损伤会破坏这种平衡,其功能后果尚不清楚.

研究的目的:

  • 为了研究听觉神经带突触形态的与年龄相关的变化.
  • 为了比较老化大鼠的不同色度位点的突触变化.
  • 为了确定特定的听觉神经纤维种群是否优先受到老化影响.

主要方法:

  • 在前突触带和后突触谷氨酸受体贴片上进行免疫光标记.
  • 微观分析 gerbil cochleae 中的突触形态.
  • 年轻成年和安静年龄的鹿在顶端,中端和基底耳区域之间的比较.

主要成果:

  • 在安静年龄的羊中观察到显著的~20%的 afferent带突触损失.
  • 在角 (低频) 位置的突触损失是随机的.
  • 在基底 (高频率) 位置,与年龄相关的损失主要影响了调节侧突触.

结论:

  • 老龄化导致听觉神经带突触的显著损失,特别是在耳底部.
  • 调节性突触的偏好性损失表明主要影响的是低自发率的听觉神经纤维.
  • 保持了模块和支柱侧之间的突触形态差异,支持特定纤维类型的选择性损失.