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相关概念视频

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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Long-term Potentiation01:35

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

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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...
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Associative Learning01:27

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Associative learning is a fundamental concept in behavioral psychology, wherein a connection is established between two stimuli or events, leading to a learned response. This process is critical in understanding how behaviors are acquired and modified. Conditioning, the mechanism through which associations are formed, can be divided into two main types: classical conditioning and operant conditioning, each elucidating different aspects of associative learning.
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Long-term Depression01:03

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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.
Calcium Ion Concentration Mechanism
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Aversive Associative Learning and Memory Formation by Pairing Two Chemicals in Caenorhabditis elegans
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神经元组合动态是长期关联记忆的基础.

Benjamin F Grewe1,2,3, Jan Gründemann4, Lacey J Kitch1,2,3

  • 1James H. Clark Center for Biomedical Engineering &Sciences, Stanford University, Stanford, California, USA.

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|March 23, 2017
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概括
此摘要是机器生成的。

杏仁体中的神经元组合学习刺激之间的关联. 这种大脑可塑性重塑神经表征,对记忆形成和预测行为条件至关重要.

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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
  • 记忆研究 记忆研究

背景情况:

  • 关联式学习对记忆至关重要.
  • 关联记忆编码的基础的神经机制仍然不清楚.
  • 杏仁体在恐惧调节和记忆中发挥着关键作用.

研究的目的:

  • 研究杏仁体中神经元组合如何编码有条件刺激 (CS) 和无条件刺激 (US) 之间的关联.
  • 探索神经元可塑性在恐惧学习和灭绝过程中的动态.

主要方法:

  • 使用微型光显微镜追踪小鼠桃体神经元组合中的Ca2+动态.
  • 在6天内,在恐惧调节和灭绝过程中监测神经活动.
  • 与行为条件强度相关的神经合体活动.

主要成果:

  • 在CS引起的神经元反应中,恐惧调节诱导了双向可塑性.
  • 经过条件化后,CS的神经合体表示变得与美国表示更加相似.
  • 灭绝培训增强了CS表示的独特性,但没有回到基线.
  • 由合奏编码的CS-US协会的强度预测了行为条件.

结论:

  • 杏仁体细胞组合在协会学习过程中动态重塑神经表征.
  • 研究结果支持协会记忆的监督学习模型.
  • 神经元组合中的双向可塑性是编码CS-US关联的关键机制.