Related Experiment Video

Updated: May 6, 2026

Measuring Cardiac Autonomic Nervous System ANS Activity in Toddlers - Resting and Developmental Challenges
08:22

Measuring Cardiac Autonomic Nervous System ANS Activity in Toddlers - Resting and Developmental Challenges

Published on: February 25, 2016

14.4K

Variations of normal sinus node function in relation to age: role of autonomic influence

M de Marneffe, P Jacobs, R Haardt

    European Heart Journal
    |August 1, 1986
    PubMed
    Summary

    As people age, intrinsic sinus node function declines, but this is balanced by decreasing parasympathetic activity, maintaining stable heart function throughout life.

    More Related Videos

    Methods for the Isolation, Culture, and Functional Characterization of Sinoatrial Node Myocytes from Adult Mice09:32

    Methods for the Isolation, Culture, and Functional Characterization of Sinoatrial Node Myocytes from Adult Mice

    Published on: October 23, 2016

    13.5K
    Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice09:20

    Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice

    Published on: July 5, 2021

    2.7K

    Related Concept Videos

    Autonomic Nervous System01:22

    Autonomic Nervous System

    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...
    31.7K
    Electrophysiology of Normal Cardiac Rhythm01:19

    Electrophysiology of Normal Cardiac Rhythm

    The normal cardiac rhythm is a synchronized electrical activity that facilitates the regular and coordinated contraction of the heart muscle. This process is essential for efficient blood circulation throughout the body. The fundamental elements involved in establishing and maintaining this rhythm include the unique electrical properties of cardiac muscle cells, the sinoatrial (SA) node's pacemaker function, the specialized conducting system, and the ionic mechanisms underlying each phase...
    7.8K
    Conduction System of the Heart01:19

    Conduction System of the Heart

    Autorhythmicity is a term that refers to the heart's inherent ability to generate electrical signals and instigate muscle contractions. This self-regulating conduction system within the heart consists of two key components: the pacemaker cells and specialized conducting cells.
    The pacemaker cells are located in two primary nodes: the sinoatrial (SA) node and the atrioventricular (AV) node. The SA node pacemaker cells can autonomously depolarize, triggering an action potential that leads to the...
    13.8K
    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...
    6.2K
    Conduction System of the Heart01:20

    Conduction System of the Heart

    The cardiac conduction system produces and transmits electrical impulses that prompt myocardial contraction, ensuring efficient heart function. This intricate system ensures that the heart beats in a coordinated and efficient manner, beginning with the atria and then the ventricles. The conduction system optimizes cardiac output by maintaining this precise sequence, which is crucial for adequate blood circulation.
    This system relies on the unique properties of nodal and Purkinje cells:...
    6.1K
    ECG Interpretation of Arrhythmias I: Sinus Arrhythmias01:16

    ECG Interpretation of Arrhythmias I: Sinus Arrhythmias

    Arrhythmias are disturbances in the heart's rhythm that lead to abnormal heartbeats. These irregularities can originate from different parts of the heart and are classified based on their origin and nature.
    Types of Arrhythmias
    Sinus Node Arrhythmias
    Sinus Bradycardia: Originating from the sinoatrial (SA) node, sinus bradycardia involves slower impulses, resulting in a heart rate of less than 60 beats per minute (bpm). Causes include sleep, vagal stimulation, beta-blockers, hypothyroidism,...
    1.2K