Related Experiment Video
Updated: Jan 28, 2026
09:23
Harmonic Nanoparticles for Regenerative Research
Published on: May 1, 2014
12.1K
A physics-based rigid-body model of motion-induced electromagnetic harmonic artifacts in surface biosignals
1Department of Kinesiology, Neuroscience and Cognitive Science Program, University of Maryland, College Park, MD 20742, United States of America.
Journal of Neural Engineering
|January 26, 2026
Summary
Motion-induced electromagnetic interference in biosignals is explained by a new physics-based model. This model, integrating electromagnetism and kinematics, accurately predicts artifacts from movement in magnetic fields, aiding signal interpretation.
Area of Science:
- Biomedical Engineering
- Electromagnetism
- Biomechanics
Background:
- Motion-induced electromagnetic interference (EMI) complicates biosignal analysis.
- Existing methods struggle to accurately interpret biosignals during movement.
Purpose of the Study:
- To develop a physics-based model for motion-induced artifacts in surface biosignals.
- To understand the electromagnetic induction mechanisms during movement.
Main Methods:
- Derived a rigid-body model integrating electromagnetic theory and kinematics.
- Used computational simulations of treadmill locomotion.
- Validated against empirical electroencephalography and accelerometer data.
Main Results:
- The model predicts motion-locked harmonic patterns in biosignals up to 15 Hz.
- Rotational motion was identified as the dominant source of induced electromotive force (EMF).
- Simulated spectra closely matched empirical data, confirming model validity.
Conclusions:
- Rigid-body motion in varying magnetic fields naturally generates harmonic contamination in biosignals.
- The physics-based framework aids in interpreting motion artifacts.
- Motivates mitigation strategies using motion and magnetic field measurements.
Related Concept Videos
01:12Equation of Motion for a Rigid Body
623
The movement of a rigid object can be understood through the equations that explain both translational and rotational motion about the center of mass of the object, point G. This center of mass is the point where the equation of motion for translational motion comes into play, as per Newton's Second Law.
The combined moments generated about the center of mass of the object are equal to the rate of change of the angular momentum of the body. An external force, when applied at a different...
The combined moments generated about the center of mass of the object are equal to the rate of change of the angular momentum of the body. An external force, when applied at a different...
623
01:22Planar Rigid-Body Motion
1.0K
Understanding the movement of a rigid body in planar motion involves recognizing that every particle within this body is traversing a path that maintains a consistent distance from a specific plane. This concept is fundamental in the study of physics and mechanical engineering, and it allows us to comprehend better how objects move in space.
Planar motion is typically divided into three distinct categories. The first is rectilinear translation, demonstrated by a subway train that moves along...
Planar motion is typically divided into three distinct categories. The first is rectilinear translation, demonstrated by a subway train that moves along...
1.0K
01:21Simple Harmonic Motion
15.0K
Simple harmonic motion is the name given to oscillatory motion for a system where the net force can be described by Hooke's law. If the net force can be described by Hooke's law and there is no damping (by friction or other non-conservative forces), then a simple harmonic oscillator will oscillate with equal displacement on either side of the equilibrium position. To derive an equation for period and frequency, the equation of motion is used. The period of a simple harmonic oscillator is given...
15.0K
00:49Rigid Body Equilibrium Problems - I
5.5K
A rigid body is said to be in static equilibrium when the net force and the net torque acting on the system is equal to zero. To solve for rigid body equilibrium problems, do the following steps.
5.5K
01:21Rigid Body Equilibrium Problems - II
8.0K
A rigid body is in static equilibrium when the net force and the net torque acting on the system are equal to zero.
Consider two children sitting on a seesaw, which has negligible mass. The first child has a mass (m1) of 26 kg and sits at point A, which is 1.6 meters (r1) from the pivot point B; the second child has a mass (m2) of 32 kg and sits at point C. How far from the pivot point B should the second child sit (r2) to balance the seesaw?
Consider two children sitting on a seesaw, which has negligible mass. The first child has a mass (m1) of 26 kg and sits at point A, which is 1.6 meters (r1) from the pivot point B; the second child has a mass (m2) of 32 kg and sits at point C. How far from the pivot point B should the second child sit (r2) to balance the seesaw?
8.0K
01:42Simple Harmonic Motion and Uniform Circular Motion
5.6K
While simple harmonic motion and uniform circular motion may be two separate concepts, they correlate and interlink with each other. Simple harmonic motion is an oscillatory motion in a system where the net force can be described by Hooke's law, while uniform circular motion is the motion of an object in a circular path at constant speed.
There is an easy way to produce simple harmonic motion by using uniform circular motion. For instance, consider a ball attached to a uniformly rotating...
There is an easy way to produce simple harmonic motion by using uniform circular motion. For instance, consider a ball attached to a uniformly rotating...
5.6K