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相关概念视频

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.
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...

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相关实验视频

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A Lateralized Odor Learning Model in Neonatal Rats for Dissecting Neural Circuitry Underpinning Memory Formation
10:42

A Lateralized Odor Learning Model in Neonatal Rats for Dissecting Neural Circuitry Underpinning Memory Formation

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对于嗅觉学习的尖峰时间依赖的可塑性有条件调制.

Stijn Cassenaer1, Gilles Laurent

  • 1Division of Biology, California Institute of Technology, Pasadena, California 91125, USA. stijn@caltech.edu

Nature
|January 27, 2012
PubMed
概括

中的体在虫中使用尖峰时间依赖的可塑性 (STDP) 进行关联式学习. 神经调节器指定哪些突触发生变化,转换记忆形成的STDP规则.

科学领域:

  • 神经科学是一个神经科学.
  • 昆虫的学习和记忆.
  • 突触性可塑性 突触性可塑性

背景情况:

  • 体对于昆虫的关联学习至关重要.
  • 体中的可塑性和特异性的机制尚未完全理解.
  • 赫比亚的尖峰时间依赖性可塑性 (STDP) 调节虫体中的突触时间.

研究的目的:

  • 调查STDP在昆虫体内的协会学习中的作用.
  • 确定突触修饰是如何指定和与强化联系的.
  • 阐明STDP规则在协会学习过程中的转变.

主要方法:

  • 在虫的体内实验.
  • 使用前后突触配对来诱导STDP.
  • 加强介导神经调节剂的局部输送.
  • 对突触变化和STDP规则转换的分析.

主要成果:

  • 与神经调节器输送相结合的STDP指定了关联性突触变化.
  • 突触修饰只发生在目标突触上.
  • 在这些特定的突触处,STDP规则本身就发生了变化.
  • 关联式学习发生在配对和神经调节之间的时间间隙中.

更多相关视频

Ex Vivo Optogenetic Interrogation of Long-Range Synaptic Transmission and Plasticity from Medial Prefrontal Cortex to Lateral Entorhinal Cortex
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Ex Vivo Optogenetic Interrogation of Long-Range Synaptic Transmission and Plasticity from Medial Prefrontal Cortex to Lateral Entorhinal Cortex

Published on: February 25, 2022

In Vivo Optical Calcium Imaging of Learning-Induced Synaptic Plasticity in Drosophila melanogaster
06:35

In Vivo Optical Calcium Imaging of Learning-Induced Synaptic Plasticity in Drosophila melanogaster

Published on: October 8, 2019

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A Lateralized Odor Learning Model in Neonatal Rats for Dissecting Neural Circuitry Underpinning Memory Formation
10:42

A Lateralized Odor Learning Model in Neonatal Rats for Dissecting Neural Circuitry Underpinning Memory Formation

Published on: August 18, 2014

Ex Vivo Optogenetic Interrogation of Long-Range Synaptic Transmission and Plasticity from Medial Prefrontal Cortex to Lateral Entorhinal Cortex
11:31

Ex Vivo Optogenetic Interrogation of Long-Range Synaptic Transmission and Plasticity from Medial Prefrontal Cortex to Lateral Entorhinal Cortex

Published on: February 25, 2022

In Vivo Optical Calcium Imaging of Learning-Induced Synaptic Plasticity in Drosophila melanogaster
06:35

In Vivo Optical Calcium Imaging of Learning-Induced Synaptic Plasticity in Drosophila melanogaster

Published on: October 8, 2019

结论:

  • 在昆虫体中,STDP在协会学习中发挥着直接作用.
  • 神经调节剂作为关键信号来指定关联突触可塑性.
  • 突触可塑性机制可以是动态的,改变学习规则.
  • 这项研究揭示了STDP在神经计算和记忆中的多方面的作用.