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Long-term Potentiation01:35

Long-term Potentiation

51.6K
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.
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Long-term Depression01:05

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.
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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...
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Long-term Depression01:03

Long-term Depression

2.6K
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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Neuroplasticity01:01

Neuroplasticity

2.6K
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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Traumatic Memory01:20

Traumatic Memory

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Emotionally traumatic events often lead to memories that are exceptionally vivid and enduring, sometimes persisting with remarkable clarity throughout an individual's life. A classic example of this phenomenon is a person who survives a car accident. Even years later, they may recall every detail of the event with startling accuracy — the screeching of the tires, the jarring impact, and the acrid smell of burning rubber. Such vividness contrasts sharply with how an individual...
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Updated: May 5, 2026

Multi-electrode Array Recordings of Neuronal Avalanches in Organotypic Cultures
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Multi-electrode Array Recordings of Neuronal Avalanches in Organotypic Cultures

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経験は,皮質回路に永続的な構造的痕跡を残します.

Sonja B Hofer1, Thomas D Mrsic-Flogel, Tobias Bonhoeffer

  • 1Max Planck Institute of Neurobiology, D-82152 Martinsried, Germany.

Nature
|November 14, 2008
PubMed
まとめ
この要約は機械生成です。

感覚情報の保存に不可欠なデンドリット状の脊椎の構造の変化は,最初の経験の後も持続することがあります. この研究は,哺乳類の新皮質におけるこれらのシナプス改変が,長期的な記憶記憶の基礎を形成する方法を明らかにしています.

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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

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Author Spotlight: Exploring Glial Influence in Experience-Dependent Synaptic Pruning During Critical Periods
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関連する実験動画

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Multi-electrode Array Recordings of Neuronal Avalanches in Organotypic Cultures
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Multi-electrode Array Recordings of Neuronal Avalanches in Organotypic Cultures

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Investigating Long-term Synaptic Plasticity in Interlamellar Hippocampus CA1 by Electrophysiological Field Recording
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Author Spotlight: Exploring Glial Influence in Experience-Dependent Synaptic Pruning During Critical Periods
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科学分野:

  • 神経科学は神経科学である.
  • シナプスの可塑性
  • コルティカル回路は,

背景:

  • 感覚体験は,哺乳類の新皮質のニューロン回路を形成する.
  • シナプスの再構成,特にデンドリット状の脊椎における再構成は,情報保存のための提案されたメカニズムである.
  • 長期記憶記憶のための状脊椎の変化の持続性は不明である.

研究 の 目的:

  • dendritic spinesの構造的変化が感覚体験を長生きできるかどうかを調査する.
  • 新皮質の長期情報保存におけるデンドリット脊椎のダイナミクスの役割を調査する.
  • 機能的な可塑性を,記憶形成のためのシナプス再配置と結びつける.

主な方法:

  • 成人マウスの視覚皮質におけるピラミッド状ニューロンデンドライトの脊椎動態の追跡.
  • モノキュラー剥奪 (片目を閉じる) を通して可塑性を誘発する.
  • 感覚インプットの変化の際に,そしてその後に,脊椎の密度と形成速度の変化を分析する.

主要な成果:

  • 最初の単眼欠乏エピソードは,脊椎形成率を倍増させ,双眼皮質の5層細胞の脊椎密度を増加させた.
  • 双眼視力の回復の後,脊椎の動態は正常化しましたが,脊椎の密度は上昇し続け,欠乏期からの持続的な脊椎があります.
  • 繰り返された単眼欠乏は,目特有の反応における堅固な機能的変化にもかかわらず,脊髄補充をさらに増加させなかった.

結論:

  • 初期の感覚体験中に追加された歯茎状の脊椎が持続し,その後の機能的シフトのための構造的基盤を提供する可能性があります.
  • この研究は,新皮質における機能的可塑性とシナプスの再編成との強い関連を確立しています.
  • 以前の感覚体験は,状脊椎の構造的な変化を通して,皮質回路に保存されることがあります.