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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.
The Synapse02:47

The Synapse

Neurons communicate with one another by passing on their electrical signals to other neurons. A synapse is the location where two neurons meet to exchange signals. At the synapse, the neuron that sends the signal is called the presynaptic cell, while the neuron that receives the message is called the postsynaptic cell. Note that most neurons can be both presynaptic and postsynaptic, as they both transmit and receive information.
Neurons as Communicators of the Brain01:22

Neurons as Communicators of the Brain

Neurons, the fundamental units of the brain and nervous system, function as the primary transmitters of information throughout the body. Their ability to communicate through electrical and chemical signals is vital for every bodily function, from regulating the heartbeat to processing complex thoughts. Each neuron has three main components: the cell body (soma), dendrites, and an axon, each specialized to facilitate swift and efficient neural communication.
Cell Body
The cell body, also known...
Neuronal Communication01:28

Neuronal Communication

Neurons, the fundamental units of the brain and nervous system, communicate through complex electrochemical signals that underpin all cognitive and bodily functions. This communication is primarily facilitated by a process involving the generation and propagation of an action potential along the axon of the neuron. When the internal electrical charge of a neuron surpasses a certain threshold, an action potential is triggered. This rapid change in voltage travels swiftly along the axon to the...
Neuroplasticity01:01

Neuroplasticity

Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.
Gut-Brain Axis01:22

Gut-Brain Axis

The gut–brain axis is a bidirectional communication system that connects the gastrointestinal tract and the brain. This interaction is mediated through multiple pathways, including the vagus nerve, hormonal signals, immune responses, and chemical messengers produced by gut microbes.Microbial Contributions to Brain FunctionGut microbiota contributes significantly to brain function by producing neuroactive compounds. These include neuroactive compounds that influence neurotransmitters such as...

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相关实验视频

Updated: Jun 25, 2026

Vibrodissociation of Neurons from Rodent Brain Slices to Study Synaptic Transmission and Image Presynaptic Terminals
08:38

Vibrodissociation of Neurons from Rodent Brain Slices to Study Synaptic Transmission and Image Presynaptic Terminals

Published on: May 25, 2011

大脑的硬件连接:内分泌大麻素塑造神经元连接.

Paul Berghuis1, Ann M Rajnicek, Yury M Morozov

  • 1Division of Molecular Neurobiology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, S-17177 Stockholm, Sweden.

Science (New York, N.Y.)
|May 26, 2007
PubMed
概括

内分泌大麻素在大脑发育过程中充当关键的轴突指导线索. 它们通过激活大麻素受体 (CB1Rs) 来调节特定神经元的生长和向选择,从而影响协同生成.

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Dendritic Spine Quantification Using an Automatic Three-Dimensional Neuron Reconstruction Software
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Dendritic Spine Quantification Using an Automatic Three-Dimensional Neuron Reconstruction Software

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Last Updated: Jun 25, 2026

Vibrodissociation of Neurons from Rodent Brain Slices to Study Synaptic Transmission and Image Presynaptic Terminals
08:38

Vibrodissociation of Neurons from Rodent Brain Slices to Study Synaptic Transmission and Image Presynaptic Terminals

Published on: May 25, 2011

Assessment of Ultrastructural Neuroplasticity Parameters After In Utero Transduction of the Developing Mouse Brain and Spinal Cord
10:28

Assessment of Ultrastructural Neuroplasticity Parameters After In Utero Transduction of the Developing Mouse Brain and Spinal Cord

Published on: February 26, 2019

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科学领域:

  • 神经科学是一个神经科学.
  • 发展生物学 发展生物学
  • 细胞生物学 细胞生物学

背景情况:

  • 内分泌大麻素信号在中枢神经系统发育中的作用仍然在很大程度上未被探索.
  • 了解神经发育对于解决神经系统疾病至关重要.

研究的目的:

  • 为了研究内分泌大麻素信号传递在中枢神经系统发育中的作用.
  • 确定大麻素受体1 (CB1R) 在神经元发育和突触生成中的作用.

主要方法:

  • 利用动物模型和Xenopus laevis来研究轴突生长和神经元发育.
  • 研究了CB1Rs在GABAergic内部神经元中的局部化和功能.
  • 通过RhoA激活试验和加尔瓦诺托普主义实验,研究了内分泌素对生长形态和神经元引导的影响.

主要成果:

  • CB1Rs在动物皮层中发育的GABAergic内部神经元的轴突生长中得到丰富.
  • 内分类固醇诱导CB1R内部化并激活RhoA,导致生长体崩和化学排斥.
  • 内分类药物抑制了Xenopus脊髓神经元中的光化.
  • 缺少CB1Rs的小鼠表现出皮质GABAergic内部神经元的目标选择受损.

结论:

  • 在中枢神经系统发育过程中,内分类素作为关键的轴突指导线索起作用.
  • 内分泌大麻素信号调节协同生成和目标选择 in vivo.
  • CB1R信号传输对于发育中的大脑的正确布线至关重要.