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相关概念视频

Long-term Potentiation01:35

Long-term Potentiation

54.6K
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.
54.6K
Long-term Depression01:03

Long-term Depression

2.5K
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
If over...
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Synaptic Signaling01:09

Synaptic Signaling

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Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
Most synapses are chemical, meaning an electrical impulse or action potential spurs the release of chemical messengers called neurotransmitters. The neuron sending the signal is called the presynaptic neuron, and the neuron receiving the signal is the postsynaptic neuron.
The presynaptic neuron fires an action potential that...
5.5K
Integration of Synaptic Events01:28

Integration of Synaptic Events

1.4K
Synaptic integration mainly includes the summation of graded potentials. Graded potentials, regardless of their type, cause subtle alterations in membrane voltage, resulting in either depolarization or hyperpolarization. These incremental changes, when combined or summed, can propel the neuron toward its threshold. Consider, for example, a membrane experiencing a +15 mV shift, causing it to depolarize from -70 mV to -55 mV. In this scenario, graded potentials govern the membrane's ability...
1.4K
Chemical Synapses01:26

Chemical Synapses

8.6K
Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
8.6K
Role of Neurotransmitters in Memory01:23

Role of Neurotransmitters in Memory

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Neurotransmitters are integral to the brain's communication system, enabling neurons to transmit signals across synapses. This chemical exchange underpins various cognitive functions, including memory processes. The role of neurotransmitters in memory is multifaceted, influencing the encoding, consolidation, and retrieval of memories through their action on different neural circuits.
 Glutamate and Synaptic Plasticity
Glutamate, the brain's main excitatory neurotransmitter, is...
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相关实验视频

Updated: May 27, 2025

Investigation of Synaptic Tagging/Capture and Cross-capture using Acute Hippocampal Slices from Rodents
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Investigation of Synaptic Tagging/Capture and Cross-capture using Acute Hippocampal Slices from Rodents

Published on: September 4, 2015

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符合条件的痕迹作为学习的突触基质.

Harel Z Shouval1, Alfredo Kirkwood2

  • 1Department of Neurobiology and Anatomy, University of Texas Medical School at Houston, Houston, TX, USA; Department of Electrical and Computer Engineering, Rice University, Houston, TX, USA.

Current opinion in neurobiology
|February 18, 2025
PubMed
概括
此摘要是机器生成的。

突触资格痕迹使动物能够将行动与延迟的生存奖励联系起来. 这些对学习至关重要的痕迹支持神经连接的加强和削弱,防止突触和.

更多相关视频

High Resolution Quantitative Synaptic Proteome Profiling of Mouse Brain Regions After Auditory Discrimination Learning
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High Resolution Quantitative Synaptic Proteome Profiling of Mouse Brain Regions After Auditory Discrimination Learning

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Presynaptically Silent Synapses Studied with Light Microscopy
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Presynaptically Silent Synapses Studied with Light Microscopy

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相关实验视频

Last Updated: May 27, 2025

Investigation of Synaptic Tagging/Capture and Cross-capture using Acute Hippocampal Slices from Rodents
11:29

Investigation of Synaptic Tagging/Capture and Cross-capture using Acute Hippocampal Slices from Rodents

Published on: September 4, 2015

13.9K
High Resolution Quantitative Synaptic Proteome Profiling of Mouse Brain Regions After Auditory Discrimination Learning
10:36

High Resolution Quantitative Synaptic Proteome Profiling of Mouse Brain Regions After Auditory Discrimination Learning

Published on: December 15, 2016

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Presynaptically Silent Synapses Studied with Light Microscopy
11:02

Presynaptically Silent Synapses Studied with Light Microscopy

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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
  • 学习和记忆的学习和记忆

背景情况:

  • 动物学习刺激/行为和延迟奖励之间的关联,这对生存至关重要.
  • 交感资格跟踪是拟议的机制,弥合了行动和延迟奖励之间的差距.
  • 这些痕迹是慢慢腐烂的标签,可以在奖励时诱导突触可塑性.
  • 最近的实验证实了各种神经系统中的可选性痕迹,这些痕迹是由神经调节器或平原潜力调节的.

研究的目的:

  • 探索突触可选性痕迹的存在和机制.
  • 讨论突触可塑性中增强和抑郁的含义.
  • 突出这些痕迹在建立突触停止规则和维护代表能力方面的作用.

主要方法:

  • 对近期关于突触可选性痕迹的实验发现的审查.
  • 对潜在化和抑郁症的证据分析依赖于符合条件的痕迹.
  • 关于对抗突触力量的必要性的理论讨论.

主要成果:

  • 实验证据证实,不同神经系统中的突触可选性痕迹.
  • 突触功效的增强和抑制都被证明是符合资格的痕迹依赖.
  • 强化和抑郁的相互作用对于突触停止规则至关重要.

结论:

  • 突触资格痕迹对于从延迟奖励中学习至关重要.
  • 强化和抑郁的双重性质提供了一个突触停止规则,防止和.
  • 了解这些痕迹是理解神经计算和表示稳定性的关键.