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Related Concept Videos

Pulse rhythm01:30

Pulse rhythm

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Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
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Disturbances in Heart Rhythm01:28

Disturbances in Heart Rhythm

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Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow...
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Factors Influencing Heart Rate01:30

Factors Influencing Heart Rate

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The heart rate, or pulse rate, is a vital indicator of cardiovascular health. It reflects the number of times the heart beats per minute. Various physiological and environmental factors influence heart rate, increasing or decreasing cardiac output. Understanding these factors is crucial for assessing heart function and identifying potential health issues.
Let us explore the significant factors affecting heart rate, including age, body temperature, posture, acute pain, chemical influences,...
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Conduction System of the Heart01:19

Conduction System of the Heart

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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...
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Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

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Arrhythmias are irregular heart rhythms occurring when the heart's electrical impulses become abnormal. These disturbances can lead to various symptoms, depending on their severity and the underlying cause. Some common factors contributing to arrhythmias include hypoxia, ischemia, electrolyte imbalances, excessive catecholamine exposure, drug toxicity, and muscle overstretching. Arrhythmias can be classified into two main types based on the rate and site of origin of abnormal heart rhythms.
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Special considerations while measuring blood pressure01:28

Special considerations while measuring blood pressure

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When assessing blood pressure (BP), healthcare professionals must consider various factors and potential unexpected outcomes to ensure accurate readings and provide proper patient care. Adhering to these guidelines is essential to achieving the most reliable results.
Monitoring Both Arms:
Monitoring BP in both arms during the initial assessment is advisable, as the systolic value may differ by five to ten mm Hg between arms. For subsequent BP assessments, use the arm with the higher reading.
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Related Experiment Video

Updated: Jun 25, 2025

Real-Time Proxy-Control of Re-Parameterized Peripheral Signals using a Close-Loop Interface
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Reliability for music-induced heart rate synchronization.

Ryota Nomura1

  • 1Waseda University, 2-579-15, Mikashima, Tokorozawa, Saitama, Japan. nomuraryota@waseda.jp.

Scientific Reports
|May 28, 2024
PubMed
Summary

Individual differences in perception reduce physiological synchronization during music appreciation, explaining why collective emotions are hard to achieve. Reliable physiological responses, not mood, drive synchronization.

Area of Science:

  • Neuroscience
  • Psychology
  • Physiology

Background:

  • Common inputs can synchronize biological systems, potentially explaining collective emotions in shared experiences like theater.
  • However, low inter-subject correlation of physiological signals suggests synchronization is limited.
  • Individual differences in perception and cognition may disrupt reliable physiological responses to stimuli.

Purpose of the Study:

  • To investigate the role of individual differences in perceptual and cognitive systems on physiological synchronization.
  • To test the hypothesis that reduced reliability of physiological responses disturbs synchronization.
  • To understand the mechanisms underlying collective emotions and behavioral synchronization.

Main Methods:

  • Compared inter- and intra-subject Pearson's correlation coefficients and nonlinear phase synchronization.

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  • Analyzed instantaneous heart rate data collected during music appreciation.
  • Controlled for music preferences and daily moods.

    • Main Results:

    • Inter-subject correlations were consistently lower than intra-subject correlations.
    • Physiological synchronization was independent of participants' music preferences and moods.
    • Music-induced heart rate synchronization depends on the reliability of physiological responses.

    Conclusions:

    • Individual differences in perceptual and cognitive systems decrease physiological synchronization.
    • Reliability of physiological responses, not mood or motivation, is key to synchronization.
    • This research provides a foundation for studying collective emotions in real-world settings like theater.