Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Electrocardiogram01:29

Electrocardiogram

8.4K
An electrocardiogram (ECG or EKG) is a critical diagnostic tool that records the electrical signals produced by the heart during each heartbeat. This recording is achieved through electrodes placed strategically on the arms, legs, and chest. The electrocardiograph amplifies these signals and produces 12 distinct tracings, offering a comprehensive understanding of the heart's electrical activity.
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and...
8.4K
Electrophysiology of Normal Cardiac Rhythm01:19

Electrophysiology of Normal Cardiac Rhythm

10.4K
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...
10.4K
Holter Monitor: 24-Hour Monitoring01:23

Holter Monitor: 24-Hour Monitoring

4.7K
Holter monitoring is a continuous electrocardiography (ECG) recording that tracks the heart's electrical activity over an extended period, generally 24 to 48 hours. This noninvasive diagnostic tool detects irregular heart rhythms that may not be captured during a standard ECG performed in a clinical setting.DeviceThe Holter monitor is a portable, small device connected to several electrodes on the patient's chest. These electrodes detect the heart's electrical signals and transmit them to the...
4.7K
Electrodes: Overview01:17

Electrodes: Overview

3.1K
 Electrochemical measurements are conducted in an electrochemical cell composed of various components that control and measure the current and potential. One fundamental component is electrodes, conductive materials that enable electron transfer reactions at their surfaces.
There are two main types of electrodes in electrochemical cells. The first type, known as the working or indicator electrode, has a potential that is sensitive to the analyte's concentration and reacts to changes in...
3.1K
Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

2.0K
Introduction
An electrocardiogram (ECG) is a diagnostic tool for identifying cardiac conditions such as arrhythmias, conduction abnormalities, and myocardial ischemia.
Definition
An electrocardiogram (ECG) visualizes the heart's electrical activity by tracing the electrical movement associated with each heartbeat on a graph or monitor. As the heart beats, an electrical wave passes through it, correlating with the cardiac cycle events.
Parts of an ECG
An ECG utilizes electrodes on the skin...
2.0K
Pulse Assessment Sites01:11

Pulse Assessment Sites

3.4K
Pulse assessment sites are crucial in evaluating a patient's cardiovascular health. By assessing the pulsations of arteries at specific anatomical locations, healthcare professionals can gather valuable information about blood flow, heart rate, and peripheral circulation. Understanding these pulse assessment sites is essential for conducting comprehensive cardiovascular evaluations and monitoring patients' overall health. These sites are strategically chosen due to the accessibility and...
3.4K

You might also read

Related Articles

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

Sort by
Same author

The weight of genotype on the clinical presentation of COQ7-related hereditary motor axonal neuropathy: a case series and literature review.

Arquivos de neuro-psiquiatria·2026
Same author

Risdiplam treatment in adults with spinal muscular atrophy: a single-center, real-world study.

BMC neurology·2026
Same author

MyomiR Networks in Spinal Muscular Atrophy: Associations With Clinical Severity and Treatment Response.

Molecular neurobiology·2026
Same author

The Duke MG Patient Registry III. Comparative Effectiveness of Azathioprine and Mycophenolate Mofetil in Generalized Myasthenia Gravis, a Retrospective Single Center Review.

Muscle & nerve·2026
Same author

MSTO1-related mitochondrial myopathy and ataxia syndrome: Case series and literature review.

Neuromuscular disorders : NMD·2026
Same author

Immunotherapies in autoimmune neuromuscular junction disorders: Acute and chronic management.

Handbook of clinical neurology·2026

Related Experiment Video

Updated: Apr 8, 2026

Author Spotlight: Translational Applications of Stimulated SFEMG in Rodent Models
04:30

Author Spotlight: Translational Applications of Stimulated SFEMG in Rodent Models

Published on: March 8, 2024

1.9K

Reference values for jitter recorded by concentric needle electrodes in healthy controls: A multicenter study.

Erik Stålberg1, Donald B Sanders2, Sajjad Ali3

  • 1Department of Neuroscience, Clinical Neurophysiology, Uppsala University, Uppsala, Sweden.

Muscle & Nerve
|June 27, 2015
PubMed
Summary

This study established reference values for jitter using concentric needle electrodes in healthy individuals. These new values aid in accurately diagnosing neuromuscular disorders.

Keywords:
SFEMGconcentric needle electrodehealthy controlsjitterreference material

More Related Videos

Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice
09:20

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

Published on: July 5, 2021

3.7K
Ambulatory ECG Recording in Mice
08:00

Ambulatory ECG Recording in Mice

Published on: May 27, 2010

25.1K

Related Experiment Videos

Last Updated: Apr 8, 2026

Author Spotlight: Translational Applications of Stimulated SFEMG in Rodent Models
04:30

Author Spotlight: Translational Applications of Stimulated SFEMG in Rodent Models

Published on: March 8, 2024

1.9K
Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice
09:20

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

Published on: July 5, 2021

3.7K
Ambulatory ECG Recording in Mice
08:00

Ambulatory ECG Recording in Mice

Published on: May 27, 2010

25.1K

Area of Science:

  • Neurophysiology
  • Electromyography
  • Neuromuscular diagnostics

Background:

  • Accurate reference values are crucial for interpreting jitter measurements in clinical neurophysiology.
  • Existing jitter values may not reflect current standards or diverse populations.
  • Concentric needle electrodes are widely used for jitter analysis.

Purpose of the Study:

  • To establish reliable reference values for jitter.
  • To utilize data from concentric needle electrode recordings.
  • To define jitter values for specific muscles (orbicularis oculi, frontalis, extensor digitorum) under voluntary and electrical stimulation.

Main Methods:

  • Recordings were collected globally from healthy subjects for orbicularis oculi (OO), frontalis (FR), and extensor digitorum (ED) muscles.
  • Strict criteria for signal quality were enforced.
  • Data from 59-92 subjects per muscle/activation type were analyzed to determine outlier limits for jitter.

Main Results:

  • Specific outlier limits for mean consecutive difference and individual jitter were determined for voluntary and electrical stimulation.
  • Values varied by muscle and activation type, with ranges provided (e.g., OO voluntary: 31-45 µs; OO electrical stimulation: 27-36 µs).
  • Data were derived from high-quality recordings to ensure reliability.

Conclusions:

  • Reference jitter values were successfully developed using concentric needle electrode recordings.
  • The established values are based on defined signal quality.
  • The study aimed to avoid supernormal values, providing a more accurate diagnostic baseline.