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関連する概念動画

Parasympathetic Division of the ANS01:08

Parasympathetic Division of the ANS

4.3K
The parasympathetic division of the autonomic nervous system (ANS) regulates rest and digestion functions in the body. It works in opposition to the sympathetic division, promoting relaxation, conservation of energy, and digestion. The parasympathetic division consists of preganglionic fibers originating from specific cranial nerves (III, VII, IX, X) and the sacral spinal nerves (S2-S4). These fibers synapse with postganglionic neurons in the terminal ganglia, innervating various organs and...
4.3K
Autonomic Nervous System: Overview01:26

Autonomic Nervous System: Overview

8.1K
The human nervous system is divided into two main parts: the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS is composed of the brain and spinal cord, while the PNS contains nerve cells, clusters of nerve cells, and the sensory receptors that are outside the CNS. The PNS has two types of nerve cells: sensory (afferent) and motor (efferent). Sensory cells send signals to the CNS from receptors, and motor cells carry signals from the CNS to organs, muscles, and...
8.1K
Cranial Part of Parasympathetic Division01:18

Cranial Part of Parasympathetic Division

2.4K
The cranial part of the parasympathetic division plays a crucial role in regulating the visceral functions of the head and specific structures in the neck, thoracic, and abdominopelvic cavities. Preganglionic fibers of the parasympathetic division exit the brain through cranial nerves III (oculomotor), VII (facial), IX (glossopharyngeal), and X (vagus), delivering parasympathetic output to the respective visceral structures.
The vagus nerve (cranial nerve X) alone accounts for approximately 75...
2.4K
Autonomic Nervous System01:22

Autonomic Nervous System

14.5K
The autonomic nervous system (ANS) is a critical component of the peripheral nervous system, primarily responsible for regulating involuntary bodily functions and maintaining homeostasis. It functions in tandem with the central nervous system (CNS) to seamlessly coordinate various physiological processes without the need for conscious control.
The ANS comprises two main divisions: the sympathetic and parasympathetic divisions. These divisions function antagonistically to maintain a dynamic...
14.5K
The Parasympathetic Nervous System01:14

The Parasympathetic Nervous System

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Overview
117.1K
Parasympathetic Signaling01:30

Parasympathetic Signaling

3.7K
Parasympathetic signaling plays a crucial role in regulating various physiological processes. It involves the release of acetylcholine (ACh) by parasympathetic neurons, which can have localized and short-lived effects. The majority of ACh released is rapidly inactivated at the synapse by the enzyme acetylcholinesterase (AChE), which hydrolyzes Ach into choline and acetate. Additionally, the tissue cholinesterase deactivates any ACh diffusing into the surrounding tissues.
The effects of...
3.7K

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関連する実験動画

Updated: Mar 12, 2026

Dissection of Pelvic Autonomic Ganglia and Associated Nerves in Male and Female Rats
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Dissection of Pelvic Autonomic Ganglia and Associated Nerves in Male and Female Rats

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サクラル自律流出は共感性である

I Espinosa-Medina1, O Saha1, F Boismoreau1

  • 1Institut de Biologie de l'École Normale Supérieure (IBENS), INSERM, CNRS, École Normale Supérieure, Paris Sciences et Lettres Research University, Paris, 75005 France.

Science (New York, N.Y.)
|November 19, 2016
PubMed
まとめ

長い間 副交感性と考えられてきた 交感性神経系と 共通する特徴があります この発見は自律神経系を再定義します

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Efficient Differentiation of Postganglionic Sympathetic Neurons using Human Pluripotent Stem Cells under Feeder-free and Chemically Defined Culture Conditions
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Efficient Differentiation of Postganglionic Sympathetic Neurons using Human Pluripotent Stem Cells under Feeder-free and Chemically Defined Culture Conditions

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Author Spotlight: Exploring Plasticity of Sympathetic Neurons
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Author Spotlight: Exploring Plasticity of Sympathetic Neurons

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関連する実験動画

Last Updated: Mar 12, 2026

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09:48

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Efficient Differentiation of Postganglionic Sympathetic Neurons using Human Pluripotent Stem Cells under Feeder-free and Chemically Defined Culture Conditions
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科学分野:

  • 神経科学
  • 発達生物学
  • 進化生物学

背景:

  • 自律神経系 (ANS) は,伝統的に頭蓋骨のパラシンパティックと胸椎のシンパティック流出に分かれています.
  • 排泄や排尿などの機能を制御する 骨盤内臓神経は 副交感性として分類され,サクラル神経から発生する.

研究 の 目的:

  • 自律神経系内のサクラアウトフローニューロンの分類を再評価する.
  • ネズミの頭蓋骨とサクラルの流出の表型とオントジェネティックな特徴を調査する.

主な方法:

  • 15のフェノタイプとオントジェネティック特性の比較分析
  • 頭蓋のパラシンパティックと胸のシンパティックアウトフローの前および後ギャングリオンニューロンを区別する.
  • 既定の基準に基づいてサクラ流出を評価する.

主要な成果:

  • サクラ外流ニューロンは,すべての15の特徴に基づいて,胸交感ニューロンと区別できませんでした.
  • 頭蓋骨の外流ニューロンは 胸頸部ニューロンと異なる特徴を示した.
  • これは 純粋に 副交感性 神経という 百年の古い分類に 挑戦しています

結論:

  • 自律神経系は双部構造で,頭蓋骨神経はパラシンパシー機能のみ,脊髄神経 (胸部からサクラル) はシンパシー機能のみを有する.
  • 骨盤神経生理学,自律的発達,進化に関する新しい洞察を 提供しています.