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相关概念视频

Long-term Depression01:03

Long-term Depression

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Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
Calcium Ion Concentration Mechanism
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Long-term Depression01:05

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Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
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Long-term Potentiation01:25

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Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Hebbian LTP
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Long-term Potentiation01:35

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Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
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相关实验视频

Updated: Jan 16, 2026

Recording Synaptic Plasticity in Acute Hippocampal Slices Maintained in a Small-volume Recycling-, Perfusion-, and Submersion-type Chamber System
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在依赖NMDAR的LTD之后的突触修剪优先影响孤立的突触.

Côme Camus1, Léa Leval1, Viviana Villicana-Munoz1

  • 1Interdisciplinary Institute for Neuroscience, University of Bordeaux, CNRS UMR5297, 33000 Bordeaux, France.

iScience
|October 1, 2025
PubMed
概括

长期抑郁症 (LTD) 导致突触修剪,除非活动介入. 相互协调的邻近突触相互保护,防止这种削减,影响网络活动.

关键词:
细胞神经科学 细胞神经科学分子神经科学分子神经科学神经科学是一个神经科学.

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科学领域:

  • 神经科学是一个神经科学.
  • 突触性可塑性 突触性可塑性
  • 细胞生物学 细胞生物学

背景情况:

  • 长期抑郁症 (LTD) 降低了突触强度,可能导致突触损失 (修剪).
  • 没有完全理解LTD和突触修剪之间的确切联系.

研究的目的:

  • 为了调查LTD和突触修剪之间的直接关系.
  • 确定调节LTD诱导的突触修剪的机制.

主要方法:

  • 使用神经元细胞培养物.
  • 使用了各种成像技术和电生理学.

主要成果:

  • 在LTD和突触修剪之间建立了直接关系.
  • 依赖NMDAR的LTD一直导致削减,除非通过活动抵消.
  • 确定了对于感知前突触活动至关重要的突触后离子通道.
  • 具有协调活动的邻近突触提供了对切割的相互保护.

结论:

  • LTD直接触发了突触修剪,这个过程受到突触活动水平的影响.
  • 突触修剪是由活动感应离子通道和协调网络活动来调节的.
  • 长期依赖的修剪显著影响不参与活跃网络响应的突触.