Sympathetic Nervous System (SNS): What It Is & Function - Cleveland Clinic
Your sympathetic nervous system is a network of nerves that helps your body activate its “fight-or-flight” response. This system’s activity increases when you’re stressed, in danger or physically active. Its effects include increasing your heart rate and breathing ability, improving your eyesight and slowing down processes like digestion.
Sympathetic nervous system - Wikipedia
The sympathetic nervous system (SNS or SANS, sympathetic autonomic nervous system, to differentiate it from the somatic nervous system) is one of the three divisions of the autonomic nervous system, the others being the parasympathetic nervous system and the …
Sympathetic nervous system: Definition, anatomy, function
2023年11月2日 · Some of these physical effects include faster breathing, increased heart rate and blood pressure, dilation of pupils, redirection of blood flow to important organs (e.g. brain and muscles), and increased sweating. This article will discuss the anatomy and function of the sympathetic nervous system.
交感神经 - 维基百科，自由的百科全书
交感神经（拉丁語： Sympathicus ；英語： sympathetic nervous system (SNS) ）和副交感神经共同组成自主神经系统。 大部分的器官受到两者的共同支配，大部分情况下，两者相互拮抗（例外：唾液分泌），因而可以实现对该器官的精细调节，实现 内环境 的 稳态 [ 1 ] [ 2 ] 。
周围神经系统 | 自主神经系统概述 - 知乎 - 知乎专栏
2021年2月20日 · 自主神经系统可分为3个主要部分：交感神经( sympathetic nerve)、副交感神经( parasympathetic nerve)和肠神经(nerve)。 尽管它们的分布和结构不同，但功能上却是紧密相关的。
Neuroanatomy, Sympathetic Nervous System - StatPearls - NCBI Bookshelf
2023年5月8日 · The sympathetic autonomic nervous system (SANS) is one of the two divisions of the autonomic nervous system (ANS), along with the parasympathetic nervous system (PANS), These systems primarily work unconsciously in opposite ways to regulate many functions and parts of the body.
Sympathetic nervous system | Definition & Function | Britannica
2024年9月19日 · sympathetic nervous system, division of the nervous system that functions to produce localized adjustments (such as sweating as a response to an increase in temperature) and reflex adjustments of the cardiovascular system. Under conditions of stress, the entire sympathetic nervous system is activated, producing an immediate widespread response ...
Sympathetic Nervous System: Fight or Flight Function - WebMD
The sympathetic nervous system is a sub-system of your peripheral nervous system. Whenever you touch, taste, or see something, it’s because nerves are sending impulses to...
Sympathetic Nervous System - Biology Dictionary
2019年10月4日 · The sympathetic nervous system is part of the autonomic nervous system, an extensive network of neurons that regulate the body’s involuntary processes. Specifically, the sympathetic nervous system controls aspects of the body related to the flight-or-fight response, such as mobilizing fat reserves, increasing the heart rate, and releasing ...
Sympathetic Nervous System - an overview - ScienceDirect
The sympathetic nervous system is responsible for the cardiac “fight-or-flight” response to stress and exercise. Its activation increases heart rate (positive chronotropy), cardiac contraction (positive inotropy), the speed of relaxation (positive lusiotropy), and conduction of the electrical signal through the heart (positive dromotropy).