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関連する概念動画

Long-term Potentiation01:25

Long-term Potentiation

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 presynaptic neurons...
Long-term Potentiation01:35

Long-term Potentiation

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.
Role of Cerebellum and Prefrontal Cortex in Memory01:14

Role of Cerebellum and Prefrontal Cortex in Memory

The cerebellum, while traditionally associated with motor control, also plays a crucial role in memory, particularly in procedural memory, which involves learning motor tasks that become automatic through repetition. For example, studies have shown that when the cerebellum is damaged, individuals or animals lose the ability to learn conditioned motor responses, such as the conditioned eye-blink response in classical conditioning experiments with rabbits. This study demonstrates the cerebellum's...
Higher Mental Functions of Brain: Learning and Memory01:26

Higher Mental Functions of Brain: Learning and Memory

Memory is one of the most vital higher mental functions of the brain. Memory is closely related to learning because it enables us to retain information and experiences from our past to use them in our present life. It also helps us to remember facts, events, and skills, such as riding a bike or swimming. There are two types of memory — declarative memory, which involves memorizing facts or events, and procedural memory, which enables us to remember how to do something like writing or playing an...
Long-Term Memory01:18

Long-Term Memory

Long-term memory is a relatively permanent type of memory, capable of storing vast amounts of information over extended periods. Its storage capacity is generally considered unlimited.
Long-term memory can be categorized into two primary types: explicit and implicit memory. Explicit memory, also known as declarative memory, involves the conscious recollection of information that we deliberately try to remember, recall, and articulate. This type of memory encompasses specific facts, events, and...
Long-term Depression01:03

Long-term Depression

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 time, all...

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関連する実験動画

Updated: Jun 2, 2026

Assessment of Long-term Depression Induction in Adult Cerebellar Slices
09:30

Assessment of Long-term Depression Induction in Adult Cerebellar Slices

Published on: October 16, 2019

学習関連のフィードフォワードは,メモリの精度のために必要な接続性の阻害的な成長を阻害します.

Sarah Ruediger1, Claudia Vittori, Ewa Bednarek

  • 1Friedrich Miescher Institute, Maulbeerstrasse 66, CH-4058 Basel, Switzerland.

Nature
|May 3, 2011
PubMed
まとめ

学習は,特定のシナプスを増やし,記憶の精度を高めることによって,脳の接続を強化します. ヒッポキャンプスの構造的な可塑性は,正確な記憶リコールと学習された行動に不可欠です.

さらに関連する動画

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

Published on: August 11, 2019

Improved Preparation and Preservation of Hippocampal Mouse Slices for a Very Stable and Reproducible Recording of Long-term Potentiation
09:39

Improved Preparation and Preservation of Hippocampal Mouse Slices for a Very Stable and Reproducible Recording of Long-term Potentiation

Published on: June 26, 2013

関連する実験動画

Last Updated: Jun 2, 2026

Assessment of Long-term Depression Induction in Adult Cerebellar Slices
09:30

Assessment of Long-term Depression Induction in Adult Cerebellar Slices

Published on: October 16, 2019

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

Published on: August 11, 2019

Improved Preparation and Preservation of Hippocampal Mouse Slices for a Very Stable and Reproducible Recording of Long-term Potentiation
09:39

Improved Preparation and Preservation of Hippocampal Mouse Slices for a Very Stable and Reproducible Recording of Long-term Potentiation

Published on: June 26, 2013

科学分野:

  • 神経科学は神経科学である.
  • シナプスの可塑性
  • 学習と記憶について

背景:

  • シナプスの形成と喪失を含む構造的可塑性は,成人の脳で起こります.
  • 学習と記憶におけるこれらのシナプス変化の正確な機能は,まだ完全に理解されていません.
  • 新しいシナプスの形成は,新しいスキルを学ぶこと,潜在的に記憶をコーディングすること,または検索を助けることと関連しています.

研究 の 目的:

  • ネズミの学習時に海馬と小脳回路におけるモス繊維端末複合体の再配置を調査する.
  • 学習と記憶におけるこれらの構造的再編成の機能的役割を決定する.
  • 学習誘発のシナプス可塑性と記憶精度の間の因果関係を確立する.

主な方法:

  • マウスモデル (Rab3a(-/-) とAdd2(-/-)) を使って,シナプス性可塑性と記憶を研究した.
  • 一試行および漸進的な学習の後に,急速なスパイクインテニューロンへのフィロポディアスシナプスの変化を調査した.
  • 文脈的な恐怖条件付けやモリスの水の迷路のような学習タスクの後,海馬 (CA3領域) の記憶精度とc-Fos表現パターンを評価しました.

主要な成果:

  • 学習によって誘発された,インターニューロンへのフィロポディアスシナプスの長期的な,可逆的な増加は,フィードフォワードの抑制を強化します.
  • フィードフォワード阻害の増加は,メモリリテイク時にc-Fos発現ニューロンを制限し,メモリ品質と相関しています.
  • Rab3a(-/-) マウスでは,学習誘発のシナプス変化と記憶精度が低下し,Add2(-/-) マウスでは,フィードフォワードの抑制成長が廃止され,c-Fos集合が拡大し,記憶が不正確になった.

結論:

  • 学習に関連した特定のシナプスの増加は,成人の脳における学習と記憶の精度を因果的に高めます.
  • 海馬のモッシー繊維における可塑性およびフィードフォワード抑制成長は,海馬に依存する記憶の精度にとって重要です.
  • モッシー繊維にアドゥチン2 (Add2) を復元することで,フィードフォワード抑制成長とメモリ精度の両方を救出し,その役割を確認しました.