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相关概念视频

Hearing01:31

Hearing

52.3K
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.
52.3K
The Cochlea01:13

The Cochlea

45.0K
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.
45.0K
Perception of Sound Waves01:01

Perception of Sound Waves

4.5K
The human ear is not equally sensitive to all frequencies in the audible range. It may perceive sound waves with the same pressure but different frequencies as having different loudness. Moreover, the perception of sound waves depends on the health of an individual's ears, which decays with age. The health of one's ears may also be affected by regular exposure to loud noises.
The pitch of a sound depends on the frequency and the pressure amplitude of the source. Two sounds of the same...
4.5K
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
Perceiving Loudness, Pitch, and Location01:21

Perceiving Loudness, Pitch, and Location

215
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...
215
Auditory Perception01:17

Auditory Perception

340
The auditory system is essential for sound perception, utilizing various critical structures. When sound waves enter the outer ear, they travel through the ear canal and cause the eardrum to vibrate. These vibrations are then transmitted to the middle ear, where three tiny bones – the malleus, incus, and stapes – amplify the sound. This amplification is crucial, as it ensures that the sound vibrations are strong enough to be conveyed to the inner ear. These vibrations then reach the...
340

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相关实验视频

Updated: Jul 7, 2025

Stereotactically-guided Ablation of the Rat Auditory Cortex, and Localization of the Lesion in the Brain
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Stereotactically-guided Ablation of the Rat Auditory Cortex, and Localization of the Lesion in the Brain

Published on: October 11, 2017

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一个稀疏的代码,用于听觉皮层中的自然声音背景.

Mateo López Espejo1, Stephen V David2

  • 1Neuroscience Graduate Program, Oregon Health & Science University, Portland, OR, USA.

Current research in neurobiology
|December 28, 2023
PubMed
概括
此摘要是机器生成的。

听力皮层神经元表现出长期的背景效应,在长时间内整合声音信息. 这种稀疏的神经代码增强了复杂的听觉环境的表现.

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Combined Shuttle-Box Training with Electrophysiological Cortex Recording and Stimulation as a Tool to Study Perception and Learning
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Combined Shuttle-Box Training with Electrophysiological Cortex Recording and Stimulation as a Tool to Study Perception and Learning

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In Vitro Wedge Slice Preparation for Mimicking In Vivo Neuronal Circuit Connectivity
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In Vitro Wedge Slice Preparation for Mimicking In Vivo Neuronal Circuit Connectivity

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相关实验视频

Last Updated: Jul 7, 2025

Stereotactically-guided Ablation of the Rat Auditory Cortex, and Localization of the Lesion in the Brain
09:29

Stereotactically-guided Ablation of the Rat Auditory Cortex, and Localization of the Lesion in the Brain

Published on: October 11, 2017

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Combined Shuttle-Box Training with Electrophysiological Cortex Recording and Stimulation as a Tool to Study Perception and Learning
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Combined Shuttle-Box Training with Electrophysiological Cortex Recording and Stimulation as a Tool to Study Perception and Learning

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In Vitro Wedge Slice Preparation for Mimicking In Vivo Neuronal Circuit Connectivity
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In Vitro Wedge Slice Preparation for Mimicking In Vivo Neuronal Circuit Connectivity

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科学领域:

  • 神经科学是一个神经科学.
  • 审计系统研究 审计系统研究

背景情况:

  • 准确的声音感知依赖于长时间 (数百毫秒到几秒钟) 整合信息.
  • 现有的光谱时间模型表明,听觉皮层神经元主要对短时间刺激 (几十毫秒) 作出反应.
  • 在听觉系统中,在较长时间内整合感官背景的机制仍然不清楚.

研究的目的:

  • 描述听觉皮层 (AC) 中长期存在的上下文影响.
  • 研究AC如何利用自然声音刺激整合感官背景.
  • 了解长期听觉信息处理的神经基础.

主要方法:

  • 通过将神经对探针声音的反应与不同背景声音进行比较来衡量语境效应.
  • 利用各种各样的自然声音刺激.
  • 采用编码模型分析来解释观察到的上下文效应.

主要成果:

  • 许多AC神经元表现出超越传统的光谱-时间受体场窗口的背景效应.
  • 这些上下文效应的持续时间和程度在神经元和刺激之间有很大差异.
  • 在神经群体中出现了一种稀疏的代码,编码了比单个神经元更广泛的语境.
  • 编码模型表明,本地神经群体活动和循环循环是这些长期影响的基础.

结论:

  • 听觉皮层神经元展示了比以前认为的持续时间更长的上下文效应.
  • 听觉皮层中经常出现的局部电路可能支持对感官背景的长期表现.
  • 语境效应的多样化和稀疏编码增强了复杂的听觉环境的神经表现.