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Related Concept Videos

Disorders of the Autonomic Nervous System01:18

Disorders of the Autonomic Nervous System

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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...
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Autonomic Nervous System01:22

Autonomic Nervous System

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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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Somatic Spinal Reflexes01:22

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Somatic spinal reflexes are rapid, involuntary muscular responses to external stimuli that involve the somatic musculature and the spinal cord.
One of the most well-known somatic spinal reflexes is the stretch reflex, which is activated by the sudden stretching of a muscle. This reflex involves the activation of specialized sensory receptors called muscle spindles, which are located in the muscle tissue and detect changes in the length and speed of muscle contractions. When a muscle is suddenly...
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The Parasympathetic Nervous System01:14

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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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Reflex Activity01:08

Reflex Activity

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A reflex activity is an automatic, involuntary response to specific stimuli. It is a part of our survival mechanism, designed to protect us from potential harm. For example, when a bright light suddenly shines into our eyes, we instinctively close them or look away. This is a simple reflex activity orchestrated by the nervous system without conscious thought or effort.
A reflex exam is a diagnostic procedure performed by a healthcare professional to evaluate the functionality of a patient's...
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Related Experiment Video

Updated: Oct 31, 2025

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance
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[Autonomic nervous system and reflex syncope].

Ralph Bosch1

  • 1Cardio Centrum Ludwigsburg-Bietigheim (CCLB), Asperger Str. 48, 71634, Ludwigsburg, Deutschland. r.bosch@cclb.de.

Herzschrittmachertherapie & Elektrophysiologie
|June 30, 2021
PubMed
Summary
This summary is machine-generated.

Reflex syncope, often caused by autonomic nervous system dysfunction, requires a detailed history and specific tests for diagnosis. Treatment focuses on patient education and reassurance, with pharmacotherapy and pacemakers used sparingly.

Keywords:
Carotid sinus syndromeImplantable loop recorderSituational syncopeTilt-table testingVasovagal syncope

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Area of Science:

  • Cardiology
  • Neurology
  • Autonomic Nervous System Research

Background:

  • Reflex syncope is a common condition involving the autonomic nervous system.
  • Understanding its pathophysiology is key to effective management.
  • Specific triggers often precipitate episodes.

Purpose of the Study:

  • To review the pathophysiology, diagnosis, and therapy of reflex syncope.
  • To highlight the role of the autonomic nervous system.
  • To provide guidance on diagnostic and therapeutic strategies.

Main Methods:

  • Detailed patient history taking.
  • Physical examination and 12-lead electrocardiogram (ECG).
  • Specialized diagnostic tests including tilt-table testing, carotid massage, and loop recorder implantation.

Main Results:

  • Reflex syncope is frequently linked to specific circumstances and autonomic nervous system activity.
  • A thorough history and targeted investigations are crucial for accurate diagnosis.
  • Benign prognosis is typical with appropriate patient education.

Conclusions:

  • Diagnosis relies on detailed history, physical exam, ECG, and specific tests.
  • Management prioritizes patient reassurance and education.
  • Pharmacotherapy is limited; pacemaker therapy is an option for severe, recurrent cases with asystole.