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Long-term Potentiation01:25

Long-term Potentiation

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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
LTP can occur when...
3.7K
Long-term Potentiation01:35

Long-term Potentiation

58.8K
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.
58.8K
Neuroplasticity01:01

Neuroplasticity

2.0K
Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.
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Integration of Synaptic Events01:28

Integration of Synaptic Events

4.4K
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...
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Chemical Synapses01:26

Chemical Synapses

12.0K
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...
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Chemical Synapses01:26

Chemical Synapses

4.8K
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...
4.8K

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Updated: Feb 21, 2026

Two-photon Calcium Imaging in Neuronal Dendrites in Brain Slices
10:35

Two-photon Calcium Imaging in Neuronal Dendrites in Brain Slices

Published on: March 15, 2018

11.6K

dendritic heterosynaptic plasticityは,カルシウムベースの入力学習から生じる.

Shirin Shafiee1,2, Sebastian Schmitt3,4, Christian Tetzlaff3,4

  • 1III. Institute of Physics-Biophysics, Faculty of Physics, University of Göttingen, Göttingen, Germany. shirin.shafieekamalabad@uni-goettingen.de.

Communications biology
|February 19, 2026
PubMed
まとめ
この要約は機械生成です。

刺激された dendritic 棘からのカルシウム拡散は,隣接するシナプスの変化を誘発し,ヘテロシナプスの可塑性を説明することができます. この発見は,カルシウム仮説を拡張し,デンドリット計算のためのメカニズムを明らかにします.

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Slice Patch Clamp Technique for Analyzing Learning-Induced Plasticity
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Slice Patch Clamp Technique for Analyzing Learning-Induced Plasticity

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In Vivo Optical Calcium Imaging of Learning-Induced Synaptic Plasticity in Drosophila melanogaster
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In Vivo Optical Calcium Imaging of Learning-Induced Synaptic Plasticity in Drosophila melanogaster

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関連する実験動画

Last Updated: Feb 21, 2026

Two-photon Calcium Imaging in Neuronal Dendrites in Brain Slices
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Two-photon Calcium Imaging in Neuronal Dendrites in Brain Slices

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In Vivo Optical Calcium Imaging of Learning-Induced Synaptic Plasticity in Drosophila melanogaster
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科学分野:

  • 神経科学は神経科学である.
  • 計算神経科学とは
  • バイオフィジックス 生物物理学

背景:

  • デンドライトのシナプス可塑性は,学習と認知に不可欠です.
  • 歯茎のは,シナプス性可塑性の重要な部位である.
  • 既存のモデルでは,デンドリット統合の計算能力が無視されていることが多い.

研究 の 目的:

  • ヘテロシナプス性可塑性の根底にあるメカニズムを調査する.
  • ヘテロシナプスの可塑性を説明するためにカルシウム仮説を拡張する.
  • デンドリット計算におけるカルシウムダイナミクスの役割を調査する.

主な方法:

  • デンドリットカルシウムダイナミクスの数学モデルを開発した.
  • 刺激された脊椎から隣接する脊椎へのシミュレートされたカルシウム拡散.
  • デンドリットカルシウムダイナミクスを持つ統合されたホモシナプス性可塑性.

主要な成果:

  • 刺激された脊椎に流入するカルシウムは,隣接する脊椎に拡散することが示された.
  • この拡散がヘテロシナプス性可塑性を引き起こすことが示された.
  • このモデルは,ヘテロシナプス性可塑性に関する実験の曖昧さを説明する.

結論:

  • カルシウム拡散は,ヘテロシナプス性可塑性の重要なメカニズムです.
  • Ca2+-仮説をヘテロシナプス効果を含むように拡張する.
  • 入力タイミング,脊椎距離,拡散特性がシナプス変化を調節し,デンドリット計算機構を明らかにすることを予測します.