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Long-term Potentiation01:35

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.
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Long-term Potentiation01:25

Long-term Potentiation

3.7K
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 Depression01:03

Long-term Depression

3.4K
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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Long-term Depression01:05

Long-term Depression

33.4K
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.
33.4K
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...
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Chemical Synapses01:26

Chemical Synapses

12.1K
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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Updated: Feb 23, 2026

Investigating Long-term Synaptic Plasticity in Interlamellar Hippocampus CA1 by Electrophysiological Field Recording
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Investigating Long-term Synaptic Plasticity in Interlamellar Hippocampus CA1 by Electrophysiological Field Recording

Published on: August 11, 2019

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行動時間スケールのシナプス可塑性は,CA1プレイスフィールドの基礎にある.

Katie C Bittner1, Aaron D Milstein1,2, Christine Grienberger1

  • 1Howard Hughes Medical Institute, Janelia Research Campus, Ashburn, VA 20147, USA.

Science (New York, N.Y.)
|September 9, 2017
PubMed
まとめ
この要約は機械生成です。

行動時間スケールのシナプス可塑性という 新しい形のシナプス可塑性を発見しました 脳内の場所の形成に役立ちます このプロセスは,入力が直接ニューロン発射に繋がっていない場合でも,シナプスの強さを修正することによって,配列の迅速な学習を可能にします.

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Slice Patch Clamp Technique for Analyzing Learning-Induced Plasticity
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Ex Vivo Optogenetic Interrogation of Long-Range Synaptic Transmission and Plasticity from Medial Prefrontal Cortex to Lateral Entorhinal Cortex
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Ex Vivo Optogenetic Interrogation of Long-Range Synaptic Transmission and Plasticity from Medial Prefrontal Cortex to Lateral Entorhinal Cortex

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関連する実験動画

Last Updated: Feb 23, 2026

Investigating Long-term Synaptic Plasticity in Interlamellar Hippocampus CA1 by Electrophysiological Field Recording
14:27

Investigating Long-term Synaptic Plasticity in Interlamellar Hippocampus CA1 by Electrophysiological Field Recording

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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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Ex Vivo Optogenetic Interrogation of Long-Range Synaptic Transmission and Plasticity from Medial Prefrontal Cortex to Lateral Entorhinal Cortex
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Ex Vivo Optogenetic Interrogation of Long-Range Synaptic Transmission and Plasticity from Medial Prefrontal Cortex to Lateral Entorhinal Cortex

Published on: February 25, 2022

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科学分野:

  • 神経科学
  • シナプスの可塑性
  • 学習 と 記憶

背景:

  • シナプスの可塑性は,学習と記憶において,主に活動に依存するシナプスの強さの変化によって決定的に重要です.
  • ヘッビアンの可塑性のような既存のモデルは 突合的なシナプス前と後の活動に依存しています
  • ヒッポカンプスの場所場の急速な形成の背後にあるメカニズムは,まだ完全に理解されていません.

研究 の 目的:

  • ヒッポキャンパスのCA1領域におけるプレイスフィールドの形成に起因するシナプスメカニズムを調査する.
  • 伝統的なヘブビアンの規則を超えたシナプス可塑性の新しい形態を特定する.
  • ニューロンの回路が どのように学習し 順次情報を表現するかを理解する

主な方法:

  • 海馬領域CA1における体内電気生理学で,場所の形成を観察する.
  • シナプス可塑性の誘導と時間経過を特徴付けるために,インビトロスライス電気生理学.
  • カルシウムプレートポテンシャルと サブスリーフプレシナプス刺激を用いて

主要な成果:

  • 行動時間スケールシナプス可塑性 (BTSP) と呼ばれる新種のシナプス増強が特定されました.
  • BTSPは,アクションポテンシャルと厳格な時間的な一致から独立して,単一の試験で in vivo 場所のフィールドを誘導することができます.
  • この可塑性は非対称で数秒間の時間経過を示し,複合的なピッキングの数秒前にまたは後に到着するインプットを強化します.
  • スライスでは,BTSPは,サブスレッジプレシナプス活性とカルシウムプレートポテンシャルをペアリングすることによって誘発された.

結論:

  • 行動時間スケールのシナプス可塑性は,シナプス重量で連続的な情報を素早くコードするメカニズムを提供します.
  • この可塑性規則はヘッビアン原理から逸脱し,ポストシナプス活性化直前のインプットの強化を可能にします.
  • BTSPは,予測可能な場所細胞活動が経験からどのように生じるかを理解するための枠組みを提供します.