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Neurons: The Axon01:21

Neurons: The Axon

6.2K
Axons are long, cytoplasmic processes of nerve cells capable of propagating electrical impulses known as action potentials. The cytoplasm or axoplasm of an axon contains neurofibrils, neurotubules, small vesicles, lysosomes, mitochondria, and various enzymes, all encased within the axolemma, the plasma membrane of the axon.
The axon attaches to the cell body at a cone-shaped elevation called the axon hillock. The initial part of the axon, closest to the hillock, is known as the initial segment....
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Neuron Structure01:31

Neuron Structure

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Overview
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Neuron Structure01:30

Neuron Structure

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Neurons are the main type of cell in the nervous system that generate and transmit electrochemical signals. They primarily communicate with each other using neurotransmitters at specific junctions called synapses. Neurons come in many shapes that often relate to their function, but most share three main structures: an axon and dendrites that extend out from a cell body.
Structure and Function of Neurons
The neuronal cell body—the soma— houses the nucleus and organelles vital to...
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Neuronal Communication01:28

Neuronal Communication

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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...
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Nervous Tissue: Neuron Types01:19

Nervous Tissue: Neuron Types

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Neurons, the fundamental units of the nervous system, can be classified based on both their structural and functional characteristics.
Structurally, neurons are categorized into three main types: multipolar, bipolar, and unipolar (or pseudounipolar). Multipolar neurons, which are the most common type in the brain and spinal cord, as well as all motor neurons, possess multiple dendrites and a single axon.
Bipolar neurons, on the other hand, have one primary dendrite and one axon. They are...
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Neurons as Communicators of the Brain01:22

Neurons as Communicators of the Brain

2.4K
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...
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Updated: Nov 30, 2025

Homochronic Transplantation of Interneuron Precursors into Early Postnatal Mouse Brains
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Homochronic Transplantation of Interneuron Precursors into Early Postnatal Mouse Brains

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インターニューロン 階級 闘争

Jacob M Ratliff1, Renata Batista-Brito1

  • 1Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY, USA.

Cell
|November 13, 2020
PubMed
まとめ
この要約は機械生成です。

研究者はマウス新皮質の 抑制性細胞タイプを分類しました この研究は複数の特徴を組み合わせて 内ニューロン多様性をマッピングし 脳計算におけるその役割を理解します

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Extracellularly Identifying Motor Neurons for a Muscle Motor Pool in Aplysia californica
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Extracellularly Identifying Motor Neurons for a Muscle Motor Pool in Aplysia californica

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Whole-cell Patch-clamp Recordings from Morphologically- and Neurochemically-identified Hippocampal Interneurons
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Last Updated: Nov 30, 2025

Homochronic Transplantation of Interneuron Precursors into Early Postnatal Mouse Brains
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Homochronic Transplantation of Interneuron Precursors into Early Postnatal Mouse Brains

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Extracellularly Identifying Motor Neurons for a Muscle Motor Pool in Aplysia californica
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Extracellularly Identifying Motor Neurons for a Muscle Motor Pool in Aplysia californica

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Whole-cell Patch-clamp Recordings from Morphologically- and Neurochemically-identified Hippocampal Interneurons
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Whole-cell Patch-clamp Recordings from Morphologically- and Neurochemically-identified Hippocampal Interneurons

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科学分野:

  • 神経科学
  • 細胞生物学
  • 計算神経科学

背景:

  • 哺乳類の新皮質には,神経活動と計算の調節に不可欠な様々な阻害性内ニューロンが含まれています.
  • 以前の阻害性内ニューロンの分類は,しばしば限られた特徴のセットに焦点を当て,その多様性の包括的な理解を妨げていた.

研究 の 目的:

  • ネズミの新皮質の抑制性細胞タイプを定義するための最先端の枠組みを確立する.
  • ネズミの視覚皮質の内部ニューロンの詳細な分類を提供するために.
  • 皮質計算における多様な内部ニューロン集団の機能的役割を解明する.

主な方法:

  • ニューロンの構造を定義するための形態学的分析の統合.
  • ニューロンの発火特性を評価するための電気生理学的記録.
  • 遺伝子発現プロファイルを決定するための単細胞RNA配列化 (トランスクリプトミクス).
  • 堅牢なセル型分類のためのマルチモダルのデータ統合

主要な成果:

  • マウスの視覚皮質の抑制性細胞タイプの包括的なカタログが作成されました.
  • 異なるインターニューロン集団は,形態学的,電気生理学的,およびトランスクリプトミックの組み合わせに基づいて特定されました.
  • この研究は,インターニューロン多様性の詳細な地図を提供し,新しいサブタイプとそのユニークな分子シグネチャを明らかにしています.

結論:

  • この研究は新皮質の抑制性ニューロンを分類する新しい基準を確立しました
  • この発見は,皮質回路におけるインターニューロン多様性の機能的役割に関する将来の研究のためのロードマップを提供します.
  • 複雑な認知機能の背後にあるメカニズムの解読には インターニューロン多様性の理解が不可欠です