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False Memories01:18

False Memories

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False memories represent a cognitive distortion in which individuals recall events that did not happen, or remember them in an altered form. This phenomenon highlights the brain's constructive nature in processing and recalling memories, emphasizing that memory is not a perfect representation of past events but rather a dynamic reconstruction influenced by various factors.
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Role of Amygdala in Memory01:16

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The amygdala is a small, almond-shaped structure responsible for processing and storing memories, particularly those linked to emotions like fear and stress. It plays an essential role in the brain's response to emotionally significant events and often enhances memory formation by triggering stress hormone release. The amygdala is vital for encoding and retrieving memories associated with fear or stress, a process that is adaptive by helping organisms avoid dangerous situations.
One of the...
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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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Eyewitness Memory01:22

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Eyewitness memory refers to the recollection of events by someone who has directly witnessed them, often serving as critical evidence in legal settings. This type of memory is commonly used in criminal cases where a witness describes details like a suspect's appearance, clothing, or behavior during a crime. However, despite its perceived reliability, eyewitness memory is prone to significant errors.
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Repressed Memory01:16

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Repressed memories are a psychological phenomenon where memories of traumatic events are unconsciously blocked from a person's awareness. This process occurs as a defense mechanism, protecting the mind from the emotional impact of distressing or painful experiences. For example, a person who has experienced childhood trauma may grow up with no conscious recollection of the event. In such cases, the memories are thought to be buried deep within the subconscious, inaccessible to the conscious...
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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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負の感情状態における歪んだ時間位置記憶

Qun Ye1,2, Chuang Ke1, Yuanchun Wu1

  • 1Zhejiang Philosophy and Social Science Laboratory for the Mental Health and Crisis Intervention of Children and Adolescents, School of Psychology, Zhejiang Normal University, Jinhua, People's Republic of China.

Cognition & emotion
|December 30, 2025
PubMed
まとめ

負の感情は記憶の配置を偏らせ、出来事をより早く見せる。この「早期シフトバイアス」として知られる効果は、絶対的時間記憶に影響を与えるが、出来事の順序には影響しない。

キーワード:
感情感情のスピルオーバーエピソード記憶時間記憶時間位置

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科学分野:

  • 認知神経科学
  • 心理学
  • 記憶研究

背景:

  • エピソード記憶は感情的な経験を統合しますが、しばしば時間的な精度が変化します。
  • 感情が時間情報の符号化と検索にどのように影響するかを理解することは重要です。

研究 の 目的:

  • 負の感情と感情のスピルオーバーが絶対的時間位置記憶に及ぼす影響を調査すること。
  • 状態ベースの感情的調節とアイテムベースの感情的調節を時間記憶で区別すること。

主な方法:

  • 2つの実験を通じて、細かいタイムライン推定タスクを利用しました。
  • 写真やビデオを通じて負の感情を操作し、中立的なアイテムの記憶を評価しました。
  • 覚醒を測定するために生理学的データ（皮膚電気活動、心臓減速）を収集しました。

主要な成果:

  • 負の感情は、負の刺激を実際よりも早く記憶させる「早期シフトバイアス」を誘発しました。
  • 負のビデオから後続の中立的なアイテムへの感情のスピルオーバーは、早期シフトバイアスを再現しました。
  • 状態ベースの予測因子（条件レベル）は、アイテムレベルの価数よりも時間配置をよりよく説明しました。

結論:

  • 負の感情は、時間記憶を均一に劣化させるのではなく、絶対的な時間配置を体系的に偏らせます。
  • この発見は、記憶に対する感情の影響の符号化中心モデルと時間的文脈モデルを支持します。
  • 観察された時間的バイアスには、再構成的な検索プロセスがさらに寄与する可能性があります。