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相关概念视频

The Cochlea01:13

The Cochlea

52.2K
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.
52.2K
Auditory Pathway01:15

Auditory Pathway

8.5K
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...
8.5K
Hearing01:31

Hearing

58.4K
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.
58.4K
Anatomy of the Ear01:16

Anatomy of the Ear

13.1K
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...
13.1K
Hair Cells01:22

Hair Cells

46.2K
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.
46.2K
Perceiving Loudness, Pitch, and Location01:21

Perceiving Loudness, Pitch, and Location

1.3K
The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by...
1.3K

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相关实验视频

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Activity of Posterior Lateral Line Afferent Neurons during Swimming in Zebrafish
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一个算法是鱼类方向听觉的基础.

Johannes Veith1, Ana Svanidze2, Benjamin Judkewitz2

  • 1Charité - Universitätsmedizin Berlin, 10117 Berlin, Germany; Humboldt-Universität zu Berlin, Institut für Biologie, 10099 Berlin, Germany.

Current biology : CB
|March 12, 2026
PubMed
概括
此摘要是机器生成的。

鱼类可以通过比较声压和粒子运动相来确定水下声音的方向. 这项研究揭示了鱼的惊吓反应取决于声音的频率和阶段,为定向听力提供了一个新的模型.

关键词:
丹尼奥内拉大脑菌 (Danionella cerebrum) 是一种大脑菌.瑞士的模型.方向性听觉听觉是指向性的.声音源的本地化 声音源的本地化启动响应的开始反应.

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科学领域:

  • 声学 声学 在声学方面
  • 生物声学是一种生物声学.
  • 感官神经科学是一种神经科学.

背景情况:

  • 陆地脊椎动物使用双耳线索来定位声音,但这些线索在水下不存在.
  • 尽管声音之间差异有限,但鱼类可以确定声音的方向,可能是通过相位比较.
  • 之前的工作证实了近场声音的相比较,但自然声音景观存在复杂性.

研究的目的:

  • 研究鱼类 (Danionella cerebrum) 在复杂的声音环境中如何获得定向听力.
  • 根据声音阶段和频率量化启动响应的定向调整.
  • 开发一个模型,预测鱼类听力中的感觉运动转换.

主要方法:

  • 系统地操纵了粒子运动和声脉冲压力组成部分之间的相差.
  • 在 Danionella cerebrum 中,量化了惊反应的定向调整.
  • 开发并验证了传感运动转换的预测模型.

主要成果:

  • 鱼的惊行为在很大程度上取决于声音的频率和阶段.
  • 介绍了一种新型模型,可以准确地预测鱼类对各种刺激的定向听力.
  • 证明了运动和压力之间的相位关系对于定向听力至关重要.

结论:

  • 这项研究提供了第一个模型和实验数据,用于复杂声学环境中的鱼的定向听力.
  • 这些发现表明,在一个大型的脊椎动物群体 - - 脊椎鱼中,有着方向性听觉的保存机制.
  • 这项研究推动了我们对水生动物的听觉处理和感觉运动转换的理解.