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Nervous Tissue: Neuron Types01:19

Nervous Tissue: Neuron Types

7.7K
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

5.2K
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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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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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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Neuron Structure01:31

Neuron Structure

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Overview
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Neurons: The Cell Body and the Dendrites01:23

Neurons: The Cell Body and the Dendrites

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A typical nerve cell comprises three main components: the cell body, dendrites, and the axon. The cell body, also known as the soma or perikaryon, serves as the central biosynthetic hub housing a nucleus surrounded by cytoplasm containing organelles commonly found in most cells. Notably, Nissl bodies, clusters of the rough endoplasmic reticulum and free ribosomes responsible for protein synthesis, are distinctive features of the neuronal cell body. As neurons age, aggregates of a brown pigment...
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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細胞のタイプは,機能に適している.

Adam Kepecs1, Gordon Fishell2

  • 1Cold Spring Harbor Laboratory, Marks Building, New York 11724, USA.

Nature
|January 17, 2014
PubMed
まとめ
この要約は機械生成です。

脳の抑制に不可欠なGABAergicインターニューロンは多様で,分類が難しい. この研究は,機能的な定義を狙って,基本的な発達クラスの専門的な詳細としてそれらを見ることを提案しています.

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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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Extracellularly Identifying Motor Neurons for a Muscle Motor Pool in Aplysia californica
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Homochronic Transplantation of Interneuron Precursors into Early Postnatal Mouse Brains
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Whole-cell Patch-clamp Recordings from Morphologically- and Neurochemically-identified Hippocampal Interneurons
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Extracellularly Identifying Motor Neurons for a Muscle Motor Pool in Aplysia californica
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科学分野:

  • 神経生物学 神経生物学とは
  • 細胞神経科学は細胞神経科学である.
  • 脳の回路について

背景:

  • GABAergicインターニューロン (GABAergic interneurons) は,脳内の小さな,しかし重要な細胞集団であり,神経抑制の調節に不可欠です.
  • これらのインターニューロンの多様性は,神経生物学者のために一般的分類システムを捉え難いものにしています.
  • 内ニューロンの多様性を理解することは,脳回路の機能を理解する鍵です.

研究 の 目的:

  • 遠脳におけるGABAergicインターニューロンの複雑性を理解するための新しい枠組みを提案する.
  • インターニューロンの多様性は,発達的に指定されたカーディナルクラスの有限の集合の詳細としてそれらを考慮することによって簡素化できることを示唆する.
  • 分類基準ではなく,機能によってインターニューロンタイプを定義する究極の目的を強調する.

主な方法:

  • 既存の神経生物学的データの概念分析と合成.
  • 神経細胞集団に適用される発達生物学原理.
  • ニューロンのサブタイプに対する機能的特徴化アプローチ.

主要な成果:

  • テレンセファロンの神経内複合性は,限られた数の核心発達クラス (core developmental classes) の精錬と専門化から生じることがあります.
  • 発達的な観点から,GABAergicインターニューロンの見かけの多様性を簡素化するのに役立ちます.
  • 究極の分類は,機能的な役割に基づけばよい.

結論:

  • 発達的な枠組みは,GABAergicインターニューロンのより一般的な分類への道を提供します.
  • 機能によるインターニューロンタイプの定義は,神経生物学にとって最も効果的な長期的な目標です.
  • この視点は,脳回路内の抑制の複雑な制御を理解するのに役立ちます.