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相关概念视频

Explicit Memories01:27

Explicit Memories

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Explicit memories, also known as declarative memories, are consciously remembered, recalled, and reported. Studying for a chemistry exam involves material that will become part of explicit memory. There are two types of explicit memory: episodic and semantic.
Episodic memory contains information about personally experienced events and is reported as a story. An example of episodic memory is recalling a birthday celebration. This type of memory includes the what, where, and when of an event, as...
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Autobiographical Memory01:14

Autobiographical Memory

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Autobiographical memory is a unique type of episodic memory that involves recollecting personal life experiences. It allows individuals to remember significant events from their past, creating a narrative of their lives. One interesting phenomenon related to autobiographical memory is the reminiscence bump. This effect refers to the tendency of adults to recall more events from their second and third decades of life — typically between ages 10 to 30 — than from other periods. This...
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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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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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Long-Term Memory01:18

Long-Term Memory

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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...
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Flashbulb Memory01:16

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A flashbulb memory is a highly vivid and detailed memory, often linked to events of significant emotional impact. These memories stand out in contrast to everyday memories due to their clarity and the precision with which they are recalled. The strong emotions associated with the event act as a catalyst, ensuring that specific details, such as one's location, actions, and even peripheral elements, are etched into memory with remarkable accuracy. For example, many people can vividly recall...
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A Real-world What-Where-When Memory Test
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情节性记忆包括与内部和外部事件一致的短暂和稀疏的连接.

Adam J O Dede1, Zachariah R Cross1, Samantha M Gray1,2

  • 1Northwestern University, Evanston, Illinois, United States of America.

PLoS biology
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PubMed
概括

成功的情节性记忆依赖于大脑的协调. 新的研究表明,大脑内部的事件,而不仅仅是外部的刺激,通过短暂的神经状态驱动记忆的成功.

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科学领域:

  • 神经科学是一个神经科学.
  • 认知科学 认知科学

背景情况:

  • 情节性记忆涉及到协调本地处理 (高频宽带活动,HFB) 和全球组织 (theta振荡).
  • 和HFB的异步定时引发了有关在本地处理过程中的通信的问题.

研究的目的:

  • 为了研究间歇性记忆中中间叶 (MTL) 和前额叶皮层 (PFC) 之间的协调.
  • 了解与外部刺激相比,大脑内部事件如何影响记忆过程.

主要方法:

  • 在执行识别记忆任务的患者中使用了内EEG.
  • 分析的依据是内部生成的HFB峰值和外部刺激呈现.

主要成果:

  • 前额叶皮层 (PFC) 的作用从编码 (自上而下的启动) 转向检索 (自下而上的启动).
  • 前带带皮层的连接性仅与内部HFB峰值保持一致,这表明它发挥了评估作用.
  • 成功的记忆性能与通过图形理论识别的短暂,稀疏的网络状态有关.

结论:

  • 与外部事件触发的分析相比,内部大脑事件对记忆提供了不同的视角.
  • 插曲性记忆的成功是由一系列特定的,短暂的,内部产生的神经状态驱动的.