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相关概念视频

Role of Amygdala in Memory01:16

Role of Amygdala in Memory

296
The amygdala is a small, almond-shaped structure responsible for processing and storing memories, particularly those linked to emotions like fear and stress. It plays an essential role in the brain's response to emotionally significant events and often enhances memory formation by triggering stress hormone release. The amygdala is vital for encoding and retrieving memories associated with fear or stress, a process that is adaptive by helping organisms avoid dangerous situations.
One of the...
296
Auditory Pathway01:15

Auditory Pathway

5.5K
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...
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Hearing01:31

Hearing

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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.
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Functional Brain Systems: Limbic System01:15

Functional Brain Systems: Limbic System

3.1K
The limbic system, often called the "emotional brain," is a complex set of structures located deep within the brain. The intricate network of the limbic system supports a wide range of psychological functions, from emotional regulation to memory formation and sensory processing. This functional brain region encompasses specific parts of the diencephalon and the cerebrum, integrating the higher mental functions of the cerebral cortex with the primitive emotional responses of the deep brain...
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Auditory Perception01:17

Auditory Perception

385
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...
385
Perceiving Loudness, Pitch, and Location01:21

Perceiving Loudness, Pitch, and Location

274
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...
274

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相关实验视频

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Investigating the Neural Mechanisms of Aware and Unaware Fear Memory with fMRI
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Investigating the Neural Mechanisms of Aware and Unaware Fear Memory with fMRI

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在听觉音调期间,逆向工程在侧面杏仁体中处理信息.

Greg Glickert, Ben Latimer, Pankaj Sah

    International IEEE/EMBS Conference on Neural Engineering : [proceedings]. International IEEE EMBS Conference on Neural Engineering
    |June 27, 2023
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    概括
    此摘要是机器生成的。

    这项研究模拟了哺乳动物侧面桃体,以澄清N-甲基-D-酸盐 (NMDA) 受体在听觉恐惧调节中的作用. 研究结果揭示了NMDA受体如何塑造网络活动和突触可塑性,为学习机制提供了洞察力.

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    How to Detect Amygdala Activity with Magnetoencephalography using Source Imaging
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    Combined Optogenetic and Freeze-fracture Replica Immunolabeling to Examine Input-specific Arrangement of Glutamate Receptors in the Mouse Amygdala
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    相关实验视频

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    12:51

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    科学领域:

    • 神经科学是一个神经科学.
    • 计算神经科学是一种神经科学.
    • 系统神经科学 系统神经科学

    背景情况:

    • 听觉恐惧调节涉及哺乳动物侧面桃体 (LA) 的关联性学习.
    • 对于这种学习来说,N-甲基-D-酸盐 (NMDA) 受体依赖的可塑性至关重要,但其生物物理细节仍然不清楚.
    • 作为LA学习中的巧合探测器,NMDA受体的确切作用尚未完全理解.

    研究的目的:

    • 以计算方式建模LA,以了解协同学习期间的信息流变化.
    • 调查NMDA受体在听觉恐惧调节和习惯中的特定作用.
    • 阐明LA中突触可塑性背后的生物物理机制.

    主要方法:

    • 开发LA的4000个神经元计算模型,包括金字塔细胞 (A和C类型) 和内神经元 (FSI和LTS).
    • 纳入基于 (Ca2+) 的学习规则,用于突触可塑性.
    • 在不同的调节范式下模拟网络活动和突触变化.

    主要成果:

    • 该模型确定了Tone-FSI突触中的NMDA受体在自发状态期间至关重要,LTS细胞也参与其中.
    • 模拟表明,在仅进行音调训练后,音调-PN和音调-FSI突触的长期抑郁.
    • 该模型提供了关于NMDA受体如何产生突触可塑性至关重要的网络活动的见解.

    结论:

    • 在协同学习过程中,NMDA受体在塑造LA内的网络动态和突触可塑性方面发挥着重要作用.
    • 计算模型为理解习惯于听觉刺激的生物物理基础提供了一个框架.
    • 进一步的研究可以探索这些机制,以更好地了解恐惧条件和相关的学习过程.