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Related Concept Videos

Autonomic Nervous System: Overview01:26

Autonomic Nervous System: Overview

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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...
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Autonomic Nervous System01:22

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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...
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Nervous System01:21

Nervous System

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The nervous system coordinates body functions through its complex network of nerve cells, enabling sensation and movement. It is divided into two primary parts: the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS is composed of the brain and the spinal cord. The brain acts as the body's control center, processing sensory information and coordinating responses. The spinal cord functions as a major signaling pathway for the brain and the rest of the body.
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Functional Divisions of the Nervous System01:23

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The nervous system, responsible for sensing, integrating, and responding to various stimuli, is divided into the central nervous system (CNS) and the peripheral nervous system (PNS). The PNS has two functional divisions: the sensory or afferent division and the motor or efferent division.
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Updated: Oct 13, 2025

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Basics of autonomic nervous system function.

Christopher H Gibbons1

  • 1Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States.

Handbook of Clinical Neurology
|July 7, 2019
PubMed
Summary
This summary is machine-generated.

Understanding the autonomic nervous system

Keywords:
Autonomic nervous systemAutonomic neuroanatomyEnteric nervous systemParasympathetic nervous systemSympathetic nervous system

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Area of Science:

  • Neuroscience
  • Autonomic Nervous System Anatomy

Background:

  • The autonomic nervous system (ANS) innervates most organ systems.
  • It regulates "fight or flight" and "rest and digest" functions.
  • The enteric nervous system is now recognized as a third ANS component.

Purpose of the Study:

  • To review the neuroanatomical distribution of the autonomic nervous system.
  • To provide foundational knowledge for understanding autonomic function.

Main Methods:

  • Literature review of neuroanatomical distribution.
  • Synthesis of information on sympathetic, parasympathetic, and enteric nervous systems.

Main Results:

  • Detailed overview of ANS neuroanatomy.
  • Explanation of the intricate network of ANS connections.

Conclusions:

  • Neuroanatomical knowledge is essential for understanding autonomic function.
  • The ANS, including the enteric system, plays a crucial role in systemic regulation.