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相关概念视频

Sympathetic Signaling01:31

Sympathetic Signaling

Sympathetic signaling, a vital part of the autonomic nervous system, plays a crucial role in mobilizing the body's resources in response to stress or emergencies. It involves the transmission of nerve impulses from sympathetic preganglionic fibers to postganglionic fibers. This results in the release of specific neurotransmitters and activation of adrenergic receptors.
Sympathetic preganglionic fibers release the neurotransmitter acetylcholine (ACh) onto the ganglionic neurons in the...
Disorders of the Autonomic Nervous System01:18

Disorders of the Autonomic Nervous System

The autonomic nervous system (ANS) is an intricate network of nerves that controls functions such as the regulation of heart rate, digestion, and blood pressure regulation. When this system malfunctions, it can lead to various disorders that affect multiple bodily functions. One common feature of many autonomic disorders is the involvement of smooth blood vessels, which play a crucial role in regulating blood flow throughout the body.
Raynaud's disease, also known as Raynaud's phenomenon, is a...
Regulation of Heart Rates01:31

Regulation of Heart Rates

The regulation of heart rate is a complex process controlled by the autonomic nervous system (ANS), hormonal influences, and intrinsic cardiac mechanisms. The ANS has two main components: the sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS).
The SNS increases heart rate through the release of norepinephrine and epinephrine, which act on beta-1 adrenergic receptors in the heart. This action increases the rate of depolarization in the sinoatrial (SA) node, the heart's...
Neural Regulation of Blood Pressure01:18

Neural Regulation of Blood Pressure

The neural regulation of blood pressure involves intricate interactions between the autonomic nervous system (ANS) and cardiovascular system, ensuring adequate perfusion of tissues. This regulation primarily occurs through baroreceptor and chemoreceptor reflexes, involving both short-term and long-term mechanisms.
Baroreceptor Reflex
Baroreceptors, located in the carotid sinuses and aortic arch, detect changes in blood pressure. When blood pressure rises, these stretch-sensitive receptors...
Cardiac Output I:Effect of Heart Rate on Cardiac Output01:19

Cardiac Output I:Effect of Heart Rate on Cardiac Output

Cardiac Output
Cardiac output (CO) refers to the total amount of blood ejected by one of the ventricles in liters per minute (L/min). In a resting adult, CO ranges from 5 to 6 L/min, adjusting according to the body's metabolic requirements.
Effect of Heart Rate on Cardiac Output
Cardiac output adapts to metabolic demands during stress, physical activity, or illness. The autonomic nervous system regulates heart rate via the sinoatrial node. The parasympathetic nervous system decreases heart rate...
Regulation of the Cardiovascular System01:27

Regulation of the Cardiovascular System

The regulation of the cardiovascular system allows the body to adapt to various demands and maintain homeostasis.
The regulation of the cardiovascular system involves the autonomic nervous system (ANS), baroreceptors, and chemoreceptors, ensuring that heart rate and blood pressure are appropriately modulated in response to varying physiological demands.
The ANS comprises two main divisions: the sympathetic and parasympathetic nervous systems. The sympathetic nervous system enhances...

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相关实验视频

Updated: May 11, 2026

Assessing Cerebral Autoregulation via Oscillatory Lower Body Negative Pressure and Projection Pursuit Regression
11:26

Assessing Cerebral Autoregulation via Oscillatory Lower Body Negative Pressure and Projection Pursuit Regression

Published on: December 10, 2014

单侧和双侧动脉巴罗反射刺激对心脏和神经交感放电振荡模式的影响

Raffaello Furlan1, André Diedrich, Alexandra Rimoldi

  • 1Unità Sincopi e Disturbi della Postura, Medicina Interna II, Ospedale L. Sacco, Università di Milano, Via G.B. Grassi 74, 20157 Milano, Italy. raffaellof@fisiopat.sacco.unimi.it

Circulation
|August 6, 2003
PubMed
概括
此摘要是机器生成的。

右動脈氣旋反射在控制心率和血壓變化方面比左動脈更有效. 然而,双方都同样影响了交感神经活动反应.

关键词:
非编程性的非编程性.

更多相关视频

Quantifying Acute Changes in Renal Sympathetic Nerve Activity in Response to Central Nervous System Manipulations in Anesthetized Rats
06:30

Quantifying Acute Changes in Renal Sympathetic Nerve Activity in Response to Central Nervous System Manipulations in Anesthetized Rats

Published on: September 11, 2018

Implantation of Combined Telemetric ECG and Blood Pressure Transmitters to Determine Spontaneous Baroreflex Sensitivity in Conscious Mice
09:56

Implantation of Combined Telemetric ECG and Blood Pressure Transmitters to Determine Spontaneous Baroreflex Sensitivity in Conscious Mice

Published on: February 14, 2021

相关实验视频

Last Updated: May 11, 2026

Assessing Cerebral Autoregulation via Oscillatory Lower Body Negative Pressure and Projection Pursuit Regression
11:26

Assessing Cerebral Autoregulation via Oscillatory Lower Body Negative Pressure and Projection Pursuit Regression

Published on: December 10, 2014

Quantifying Acute Changes in Renal Sympathetic Nerve Activity in Response to Central Nervous System Manipulations in Anesthetized Rats
06:30

Quantifying Acute Changes in Renal Sympathetic Nerve Activity in Response to Central Nervous System Manipulations in Anesthetized Rats

Published on: September 11, 2018

Implantation of Combined Telemetric ECG and Blood Pressure Transmitters to Determine Spontaneous Baroreflex Sensitivity in Conscious Mice
09:56

Implantation of Combined Telemetric ECG and Blood Pressure Transmitters to Determine Spontaneous Baroreflex Sensitivity in Conscious Mice

Published on: February 14, 2021

科学领域:

  • 心血管生理学心血管生理学
  • 自主神经系统功能自主神经系统功能
  • 巴罗反射调节的规则

背景情况:

  • Carotid baroreflex afferents 影响心率,动脉压,以及交感神经活动的变化.
  • 頸動脈氣質受體的單邊功能障礙可能導致異常的生理變化和影響預測.
  • 左侧与右侧动脉巴罗受体的差异性贡献仍然不清楚.

研究的目的:

  • 调查假设,单边的带气质受体刺激差异影响心率,动脉压和肌肉交感神经活动的变化.
  • 为了比较右侧,左侧和双侧动脉气质受体刺激的效果.

主要方法:

  • 十二名健康的志愿者接受了右侧,左侧和结合侧面的鼻式部吸 (0.1 Hz, -50 mm Hg).
  • 呼吸控制在0.25赫兹.
  • 功率频谱分析量化了R-R间隔的0.1-Hz振荡元件的变化,缩动脉压 (SAP) 和肌肉交感神经活动 (MSNA) 的变化.

主要成果:

  • 与左侧刺激相比,右侧和联合动脉气质受体刺激产生了R-R间隔和SAP变异性更大的增加.
  • 肌肉交感神经活动的变异性在所有单边和双边刺激条件中同样增加.
  • 平均R-R间隔,SAP和MSNA在整个程序中保持不变.

结论:

  • 在调节R-R间隔和SAP变异性方面,右动脉巴罗反射刺激比左侧刺激更有效.
  • 右动脉气反射负荷与双边刺激同样有效.
  • 在单面心动脉回路受体刺激后的肌肉交感神经活动反应中没有观察到不对称性.