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関連する概念動画

Working Memory01:24

Working Memory

171
Working memory refers to a combination of components, including short-term memory and attention, that allow an individual to hold information temporarily as we perform cognitive tasks. It is an essential cognitive function that enables the execution of complex tasks such as problem-solving, comprehension, and reasoning. Unlike short-term memory, which simply involves the storage of information for a brief period, working memory involves the active manipulation and processing of this...
171
Role of Cerebellum and Prefrontal Cortex in Memory01:14

Role of Cerebellum and Prefrontal Cortex in Memory

436
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...
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Higher Mental Functions of Brain: Learning and Memory01:26

Higher Mental Functions of Brain: Learning and Memory

809
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...
809
Interference and Decay01:16

Interference and Decay

142
Forgetting is a complex cognitive phenomenon influenced by several factors, among which interference and decay are particularly prominent. These processes explain why individuals often struggle to retrieve specific information from memory, leading to lapses in recall that can be observed in everyday situations.
Interference occurs when competing memories hinder the retrieval of particular information. It can be classified into two types: proactive and retroactive interference. Proactive...
142
Role of Neurotransmitters in Memory01:23

Role of Neurotransmitters in Memory

562
Neurotransmitters are integral to the brain's communication system, enabling neurons to transmit signals across synapses. This chemical exchange underpins various cognitive functions, including memory processes. The role of neurotransmitters in memory is multifaceted, influencing the encoding, consolidation, and retrieval of memories through their action on different neural circuits.
 Glutamate and Synaptic Plasticity
Glutamate, the brain's main excitatory neurotransmitter, is...
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Storage01:23

Storage

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A schema is a mental framework that helps individuals organize and interpret information. Schemata, formed from previous experiences, influence how we process new information: how we encode it, the inferences we make, and how we retrieve it. For instance, a schema for what a typical classroom looks like might include desks, a teacher's desk, a whiteboard, and students in such an environment. This expectation helps us quickly understand and navigate new classrooms without needing to analyze...
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Extinction Training During the Reconsolidation Window Prevents Recovery of Fear
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記憶の消滅に抵抗する脳の分散ネットワークの活動を調整する

Charlie J Clarke-Williams1, Vítor Lopes-Dos-Santos1, Laura Lefèvre1

  • 1Medical Research Council Brain Network Dynamics Unit, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford OX1 3TH, UK.

Cell
|January 19, 2024
PubMed
まとめ
この要約は機械生成です。

強い記憶は コカインを欲しがる人のように 脳の協調的な活動によって 構成されています 脳の複数の領域にわたる 高度なベータ周波数の振動パターンが 記憶の回復と更新の基礎となっています

キーワード:
アミグダラ絶滅ヒポカンプスメモリコア・アクンベンズ振動前頭皮質リコール更新するベントラル・テグメンタル領域

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科学分野:

  • 神経科学
  • 行動神経科学
  • システム神経科学

背景:

  • 永続的な記憶は 特に依存症のような 適応不良な行動と 結びついている記憶は 滅亡に耐えることが多いのです
  • 脳の複数の領域に 広範囲に広がる神経活動が 記憶によって導かれる 強力な行動の仕組みを 明らかにしていないのです

研究 の 目的:

  • 記憶による行動の根底にある 分散したニューロンの集団的組織を調べる
  • コカインに関連した記憶の 消滅後の更新の背後にある 神経的メカニズムを探る

主な方法:

  • ネズミの前頭前皮質,アキュンベンス核,桃体,海馬,腹部帯域 (VTA) の神経活動の同時モニタリング.
  • コカイン関連記憶の記憶リコール,消去,更新段階における神経振動の分析.
  • VTAの出力経路と特定の周波数帯 (ベータとセータ) の記憶表現における役割を調査する.

主要な成果:

  • 記憶回収の際に複数の脳ネットワークで,一時的に調整された,短命のベータ周波数 (15〜25 Hz) のパターンが特定されました.
  • VTAのグルタマタージックニューロンからの異なった経路は,4Hzの振動で,このマルチネットワークのベータバンド共同活性化を誘導することが判明しました.
  • クローズド・ループによる この神経活動の抑制は コカインに偏った行動の再発を防ぎました

結論:

  • 特にマルチネットワークベータバンドの振動を通して,脳分布の神経活動の時間的に構造化された調整は,堅固な記憶表現のための重要な組織原理である可能性があります.
  • VTA経路によって誘導される この協調的な活動は 薬物に関連した記憶の回収と更新に不可欠です
  • 特定の神経動態をターゲットにすることで 適応障害の再発を防ぐ 戦略が生まれます