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

Correlation between ECG and Cardiac Cycle

Correlation between ECG and Cardiac Cycle

The electrical signals recorded on an electrocardiogram (ECG) occur before the mechanical processes of contraction and relaxation during the cardiac cycle.
A cardiac action potential originates in the SA node and spreads throughout the atria and the AV node in approximately 0.03 seconds. This results in the P wave in an ECG and triggers atrial contraction. The action potential is then briefly slowed at the AV node, allowing the atria to contract and fill the ventricles with blood before...

Isotonic and Isometric Muscle Contractions

Isotonic and Isometric Muscle Contractions

Two primary types of muscle contractions are isotonic and isometric, each serving unique functions and involving distinct mechanisms. Both isotonic and isometric contractions are integral to the body's complex system of movement and stability. Isotonic exercises contribute significantly to functional strength and movement, while isometric contractions are crucial for maintaining posture and joint stability.
Isotonic contractions
Isotonic contractions occur when a muscle changes length while the...

Excitation-Contraction Coupling in Skeletal Muscles

Excitation-Contraction Coupling in Skeletal Muscles

Excitation-contraction coupling is a series of events that occur between generating an action potential and initiating a muscle contraction. It occurs at the triad, a structure found in skeletal muscle fibers that comprise a T-tubule and terminal cisternae of the sarcoplasmic reticulum on each side. These triads are visible in longitudinally sectioned muscle fibers. They are typically located at the A-I junction — the junction between the A and I bands of the sarcomere.
When an action potential...

Muscle Contraction

Muscle Contraction

In skeletal muscles, acetylcholine is released by nerve terminals at the motor endplate—the point of synaptic communication between motor neurons and muscle fibers. The binding of acetylcholine to its receptors on the sarcolemma allows entry of sodium ions into the cell and triggers an action potential in the muscle cell. Thus, electrical signals from the brain are transmitted to the muscle. Subsequently, the enzyme acetylcholinesterase breaks down acetylcholine to prevent excessive muscle...

Muscle Contraction

Muscle Contraction

Generation of Action Potential in Skeletal Muscles

Generation of Action Potential in Skeletal Muscles

Every cell in the body maintains a membrane potential due to an uneven distribution of positive and negative charges across its plasma membrane. The membrane potential is measured in millivolts and quantifies the difference in charge across the membrane.
Like neurons, muscle cells are also regarded as excitable due to their capacity to change in response to stimuli, primarily due to voltage-gated ion channels embedded in their plasma membranes, which get activated by alterations in the cell's...

You might also read

Related Articles

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

Sort by

Same author

[Autoimmune limbic encephalitis with concurrent positivity for Caspr2 and GFAPα antibodies].

Rinsho shinkeigaku = Clinical neurology·2026

Same author

Nationwide screening identifies an expanded clinical spectrum of anti-KLHL11 antibody-associated neurologic disease in Japan.

Journal of neurology·2026

Same author

ConvCGP: A convolutional neural network to predict genetic values of agronomic traits from compressed genome-wide polymorphisms.

The plant genome·2026

Same author

Brain-computer interface-based neurofeedback training enables transferable control of cortical state switching in humans.

Proceedings of the National Academy of Sciences of the United States of America·2026

Same author

Neural correlates of individual differences in motor learning under reinforcement contexts.

iScience·2026

Same author

Prevalence and profiles of clinically diagnosed autoimmune cerebellar ataxia in a Japanese nationwide survey.

Journal of neurology·2026

Search research articles

Related Experiment Video

Updated: Jun 13, 2026

Multifunctional Setup for Studying Human Motor Control Using Transcranial Magnetic Stimulation, Electromyography, Motion Capture, and Virtual Reality

Multifunctional Setup for Studying Human Motor Control Using Transcranial Magnetic Stimulation, Electromyography, Motion Capture, and Virtual Reality

Published on: September 3, 2015

Correlation between EEG-EMG coherence during isometric contraction and its imaginary execution.

Yasunari Hashimoto¹, Junichi Ushiba, Akio Kimura

¹School of Fundamental Science and Technology, Graduate School of Science and Technology, Keio University, Kanagawa, Japan. hashimoto@bme.bio.keio.ac.jp.

Acta Neurobiologiae Experimentalis

|April 22, 2010

Summary

Actual and imaginary motor tasks show similar brain activity patterns. Electroencephalography-electromyography (EEG-EMG) coherence during movement execution and EEG power increase during motor imagery (MI) correlated, suggesting overlapping neural networks.

More Related Videos

Isokinetic Robotic Device to Improve Test-Retest and Inter-Rater Reliability for Stretch Reflex Measurements in Stroke Patients with Spasticity

Isokinetic Robotic Device to Improve Test-Retest and Inter-Rater Reliability for Stretch Reflex Measurements in Stroke Patients with Spasticity

Published on: June 12, 2019

Setup for the Quantitative Assessment of Motion and Muscle Activity During a Virtual Modified Box and Block Test

Setup for the Quantitative Assessment of Motion and Muscle Activity During a Virtual Modified Box and Block Test

Published on: January 12, 2024

Related Experiment Videos

Last Updated: Jun 13, 2026

Multifunctional Setup for Studying Human Motor Control Using Transcranial Magnetic Stimulation, Electromyography, Motion Capture, and Virtual Reality

Multifunctional Setup for Studying Human Motor Control Using Transcranial Magnetic Stimulation, Electromyography, Motion Capture, and Virtual Reality

Published on: September 3, 2015

Isokinetic Robotic Device to Improve Test-Retest and Inter-Rater Reliability for Stretch Reflex Measurements in Stroke Patients with Spasticity

Isokinetic Robotic Device to Improve Test-Retest and Inter-Rater Reliability for Stretch Reflex Measurements in Stroke Patients with Spasticity

Published on: June 12, 2019

Setup for the Quantitative Assessment of Motion and Muscle Activity During a Virtual Modified Box and Block Test

Setup for the Quantitative Assessment of Motion and Muscle Activity During a Virtual Modified Box and Block Test

Published on: January 12, 2024

Area of Science:

Neuroscience
Motor Control
Cognitive Neuroscience

Background:

Cortical activity during actual and imagined movements is a key area of research in neuroscience.
Understanding the neural basis of motor imagery (MI) is crucial for rehabilitation and brain-computer interfaces.

Purpose of the Study:

To investigate the similarity between cortical activity during actual motor execution (ME) and kinesthetic motor imagery (MI).
To evaluate electroencephalography-electromyography (EEG-EMG) coherence during ME and task-related EEG power increase (TRPI) during MI.

Main Methods:

Analyzed EEG and EMG data from 13 healthy subjects performing isometric tibialis anterior (TA) contractions and imagining the same movement.
Measured EEG-EMG coherence during ME and TRPI during both ME and MI in the 14-30 Hz band.

Main Results:

Significant EEG-EMG coherence was observed during ME.
Significant TRPI was found during both ME and MI tasks within the 14-30 Hz frequency band.
A significant positive correlation was found between EEG-EMG coherence and TRPI across subjects.

Conclusions:

Motor execution and motor imagery involve overlapping neural networks in the perirolandic cortical areas.
The findings support the hypothesis that similar cortical processes underlie actual and imagined movements.
Individual differences in EEG-EMG coherence and TRPI magnitude were noted, suggesting variability in neural engagement.