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Chemical Synapses01:26

Chemical Synapses

9.8K
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...
9.8K
Synaptic Signaling01:09

Synaptic Signaling

5.9K
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...
5.9K
The Synapse02:47

The Synapse

129.0K
Neurons communicate with one another by passing on their electrical signals to other neurons. A synapse is the location where two neurons meet to exchange signals. At the synapse, the neuron that sends the signal is called the presynaptic cell, while the neuron that receives the message is called the postsynaptic cell. Note that most neurons can be both presynaptic and postsynaptic, as they both transmit and receive information.
129.0K
Overview of Synapses01:25

Overview of Synapses

3.4K
A synapse is a specialized structure where two neurons connect, allowing them to pass an electrical or chemical signal to another neuron. It is the point of communication between neurons. The term "synapse" is derived from the Greek word "synapsis," which means "conjunction." The entire process of neural communication revolves around the synapse. When activated, a neuron releases chemicals known as neurotransmitters into the synapse. These neurotransmitters cross the synapse and bind to...
3.4K
Integration of Synaptic Events01:28

Integration of Synaptic Events

2.4K
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 to...
2.4K
Excitatory and Inhibitory Effects of Neurotransmitters01:29

Excitatory and Inhibitory Effects of Neurotransmitters

11.4K
When an action potential reaches the presynaptic axon terminal, it releases neurotransmitters from the neuron into the synaptic cleft at a chemical synapse. The released neurotransmitter can be excitatory or inhibitory. The critical criteria commonly used to determine whether a molecule is a neurotransmitter at a chemical synapse are the molecule's presence in the presynaptic neuron. Second, its release is in response to strong presynaptic depolarization. And lastly, the presence of...
11.4K

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Updated: Oct 14, 2025

Presynaptically Silent Synapses Studied with Light Microscopy
11:02

Presynaptically Silent Synapses Studied with Light Microscopy

Published on: January 4, 2010

11.6K

シナプスを安定させる

David Blum1, Luísa V Lopes2

  • 1Lille Neuroscience & Cognition, Inserm UMR-S1172, Alzheimer & Tauopathies, LabEx DISTALZ, Lille Cedex, France.

Science (New York, N.Y.)
|November 4, 2021
PubMed
まとめ
この要約は機械生成です。

アデノシンは 発達中の新しい脳接続の形成に 重要な役割を果たします この分子は 新生シナプスの最終的な構造と機能を決定するのに役立ちます

さらに関連する動画

An Optical Assay for Synaptic Vesicle Recycling in Cultured Neurons Overexpressing Presynaptic Proteins
09:33

An Optical Assay for Synaptic Vesicle Recycling in Cultured Neurons Overexpressing Presynaptic Proteins

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Evaluation of Synapse Density in Hippocampal Rodent Brain Slices
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Evaluation of Synapse Density in Hippocampal Rodent Brain Slices

Published on: October 6, 2017

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関連する実験動画

Last Updated: Oct 14, 2025

Presynaptically Silent Synapses Studied with Light Microscopy
11:02

Presynaptically Silent Synapses Studied with Light Microscopy

Published on: January 4, 2010

11.6K
An Optical Assay for Synaptic Vesicle Recycling in Cultured Neurons Overexpressing Presynaptic Proteins
09:33

An Optical Assay for Synaptic Vesicle Recycling in Cultured Neurons Overexpressing Presynaptic Proteins

Published on: June 26, 2018

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Evaluation of Synapse Density in Hippocampal Rodent Brain Slices
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Evaluation of Synapse Density in Hippocampal Rodent Brain Slices

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科学分野:

  • 神経科学
  • 発達生物学
  • 分子生物学

背景:

  • シナプスの形成は 脳の発達中の重要なプロセスです
  • シナプスの成熟と安定化を制御する正確なメカニズムは完全に理解されていません.
  • アデノシンは神経調節剤で ニューロンの活動に影響を及ぼすと知られています

研究 の 目的:

  • 新生シナプスの運命を調節するアデノシンの役割を調査する.
  • アデノシンシグナリングがシナプスの発達と可塑性にどのように影響するか解明する.

主な方法:

  • 脳の発達に関する in vivo および in vitro モデルを使用した.
  • 遺伝子操作で アデノシン信号伝達経路を変えた
  • シナプス機能と構造を評価するために,電気生理学的記録と高度なイメージング技術を行いました.

主要な成果:

  • 新しく形成されたシナプスの安定化にはアデノシン信号が不可欠であることが判明しました.
  • 特定のアデノシン受容体のサブタイプが,このプロセスの主要な媒介体として特定されました.
  • アデノシンシグナル伝達が妨げられ,シナプスの異常な発達と神経ネットワークの活性が変化しました.

結論:

  • アデノシンはシナプス発達の重要なレギュレータとして機能し,長期的な運命を左右します.
  • アデノシン経路をターゲットにすることで,シナプス機能に影響する神経発達障害に対する新しい治療戦略を提供することができる.