Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Regulation of Heart Rates

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...

Factors Influencing Heart Rate

Factors Influencing Heart Rate

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,...

Golgi Apparatus

Golgi Apparatus

As they leave the Endoplasmic Reticulum (ER), properly folded and assembled proteins are selectively packaged into vesicles. These vesicles are transported by microtubule-based motor proteins and fuse together to form vesicular tubular clusters, subsequently arriving at the Golgi apparatus, a eukaryotic endomembrane organelle that often has a distinctive ribbon-like appearance.

Golgi Apparatus

Golgi Apparatus

Properly folded and assembled proteins are selectively packaged into vesicles that exit the ER. Motor proteins transport these vesicles to the Golgi apparatus for adding modifications that make these proteins functional at their destination.
The Golgi apparatus is a eukaryotic organelle that has a distinctive ribbon-like appearance. It is a primary sorting and dispatch station for cargo arriving from the ER. Newly arriving vesicles enter the cis face of the Golgi, closest to the ER, and are...

Cardiac Output I:Effect of Heart Rate on Cardiac Output

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...

Methods of Documentation I: Source-Oriented Records

Methods of Documentation I: Source-Oriented Records

Source-oriented records, or SOR, are medical record-keeping organized by the data source. The SOR system was first developed in the mid-1900s to organize the growing patient data in hospitals and other healthcare facilities.
In an SOR, each discipline involved in patient care maintains a separate medical record section. This record-keeping method enables easy tracking of patient progress and ensures healthcare staff have access to up-to-date information.
Key Attributes include the following:

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Imaging the spatiotemporal dynamics of covert attention with a pupillometric probing paradigm.

iScience·2026

Same author

Snip & Stitch: a simple and accessible correction for the pupil foreshortening error.

Behavior research methods·2026

Same author

Reappearing sensory input guides visual working memory prioritization.

Attention, perception & psychophysics·2025

Same author

Effort and salience jointly drive saccade selection.

Psychonomic bulletin & review·2025

Same author

Effort drives saccade selection.

eLife·2025

Same author

Uncovering Distinct Drivers of Covert Attention in Complex Environments With Pupillometry.

Psychophysiology·2025

Search research articles

Related Experiment Video

Updated: Jan 24, 2026

Setting Up a Stroke Team Algorithm and Conducting Simulation-based Training in the Emergency Department - A Practical Guide

Setting Up a Stroke Team Algorithm and Conducting Simulation-based Training in the Emergency Department - A Practical Guide

Published on: January 15, 2017

An open-source remote heart rate imaging method with practical apparatus and algorithms.

Koen M van der Kooij¹, Marnix Naber²

¹Experimental Psychology, Faculty of Social Sciences, Utrecht University, Utrecht, The Netherlands.

Behavior Research Methods

|June 2, 2019

Summary

This summary is machine-generated.

Remote photoplethysmography (rPPG) uses cameras to measure heart rate from skin. Facial rPPG is accurate, even after exercise, but wrist and calf measurements are unreliable.

Keywords:

Exercise Heart rate Pulse oximetry Remote photoplethysmography Respiration

More Related Videos

Novel Apparatus and Method for Drug Reinforcement

Novel Apparatus and Method for Drug Reinforcement

Published on: August 20, 2010

Methods for the Determination of Rates of Glucose and Fatty Acid Oxidation in the Isolated Working Rat Heart

Methods for the Determination of Rates of Glucose and Fatty Acid Oxidation in the Isolated Working Rat Heart

Published on: September 28, 2016

Related Experiment Videos

Last Updated: Jan 24, 2026

Setting Up a Stroke Team Algorithm and Conducting Simulation-based Training in the Emergency Department - A Practical Guide

Setting Up a Stroke Team Algorithm and Conducting Simulation-based Training in the Emergency Department - A Practical Guide

Published on: January 15, 2017

Novel Apparatus and Method for Drug Reinforcement

Novel Apparatus and Method for Drug Reinforcement

Published on: August 20, 2010

Methods for the Determination of Rates of Glucose and Fatty Acid Oxidation in the Isolated Working Rat Heart

Methods for the Determination of Rates of Glucose and Fatty Acid Oxidation in the Isolated Working Rat Heart

Published on: September 28, 2016

Area of Science:

Computer Science
Digital Image Processing
Biomedical Engineering

Background:

Advancements in computer vision enable non-contact heart rate monitoring.
Remote photoplethysmography (rPPG) extracts physiological signals from video.
Consumer cameras offer accessible rPPG implementation.

Purpose of the Study:

To structure future open-source rPPG software development for public access.
To assess the accuracy of rPPG for heart rate detection across different body parts.
To evaluate rPPG performance under post-exercise and ambient lighting conditions.

Main Methods:

Utilized consumer-level cameras (webcam, mobile) for video recording.
Applied rPPG algorithms to analyze pixel changes on skin surfaces.
Investigated rPPG accuracy on facial, wrist, and calf regions post-exercise.

Main Results:

Facial rPPG demonstrated high accuracy in heart rate detection, even after physical exertion.
rPPG recordings from wrist regions showed reduced reliability.
Calf rPPG measurements were found to be unreliable.

Conclusions:

Facial rPPG is a viable, accurate method for heart rate monitoring using consumer cameras.
rPPG accuracy varies significantly depending on the body region analyzed.
Future research should focus on improving rPPG reliability for non-facial areas.