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

Equation of Motion: General Plane motion01:22

Equation of Motion: General Plane motion

585
In the context of a rigid body's movement within a general plane, it is important to understand that this motion is typically triggered by external forces or couple moments exerted onto it. This principle can be explained through Newton's second law, which stipulates the translational motion of the body's center of mass along each axis.
Moreover, the body's center of mass experiences a rotational effect as a result of these couple moments. This rotation can be articulated as the...
585
Absolute Motion Analysis- General Plane Motion01:24

Absolute Motion Analysis- General Plane Motion

578
Visualize a drone, with its propellers spinning rapidly, hovering mid-air. The fascinating movements and operations of this drone can be comprehended by applying the principle of general plane motion.
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the...
578
Equation of Motion: General Plane motion - Problem Solving01:16

Equation of Motion: General Plane motion - Problem Solving

512
Consider a lawn roller with a mass of 100 kg, a radius of 0.2 meters, and a radius of gyration of 0.15 meters. A force of 200 N is applied to this roller, angled at 60 degrees from the horizontal plane. What will be the angular acceleration of the lawn roller?
The friction between the roller and the ground is characterized by two coefficients. The static friction coefficient is 0.15, while the kinetic friction coefficient is 0.1. These values are crucial in understanding the interaction between...
512
Projectile Motion: Example01:18

Projectile Motion: Example

13.3K
The theory of projectile motion is very useful for players of several sports to improve their performance. For example, a javelin thrower needs to throw their javelin in such a way that it travels as far as possible. The javelin thrower takes a short run-up to increase the initial speed of the javelin. The range of a projectile is at its maximum at a 45° angle so javelin throwers try to angle their throw as close to 45° as possible.
When we speak of the range (R) of a projectile on...
13.3K
Simple Harmonic Motion and Uniform Circular Motion01:42

Simple 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...
5.6K
Torque Free Motion01:15

Torque Free Motion

818
The torque-free motion refers to the movement of a rigid body in space when no external torques are acting upon it. This type of motion can be observed in environments where there are no external forces or frictions, like in outer space. For example, a rotation of Mars in space is a torque-free motion. Mars is an axisymmetric object, meaning it has an axis of symmetry along which it rotates, designated as the z-axis. The rotating frame of reference is defined such that the center of mass of...
818

You might also read

Related Articles

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

Sort by
Same author

Novel gaze stability training improves dynamic visual acuity for 6 months.

Journal of vestibular research : equilibrium & orientation·2025
Same author

The vergence-mediated gain increase: Physiology and clinical relevance.

Journal of vestibular research : equilibrium & orientation·2023
Same author

Unidirectional Vertical Vestibuloocular Reflex Adaptation in Humans Using 1D and 2D Scenes.

Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·2022
Same author

A Prospective Study on the Vestibular Toxicity of Gentamicin in a Clinical Setting.

Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·2022
Same author

Vestibulo-Ocular Reflex Short-Term Adaptation Is Halved After Compensation for Unilateral Labyrinthectomy.

Journal of the Association for Research in Otolaryngology : JARO·2022
Same author

A Once-Daily High Dose of Intraperitoneal Ascorbate Improves Vestibulo-ocular Reflex Compensation After Unilateral Labyrinthectomy in the Mouse.

Journal of the Association for Research in Otolaryngology : JARO·2022

Related Experiment Video

Updated: Feb 7, 2026

Three-Dimensional Finger Motion Tracking during Needling: A Solution for the Kinematic Analysis of Acupuncture Manipulation
08:27

Three-Dimensional Finger Motion Tracking during Needling: A Solution for the Kinematic Analysis of Acupuncture Manipulation

Published on: October 28, 2021

3.2K

An Inexpensive 6D Motion Tracking System for Posturography.

William V C Figtree1, Americo A Migliaccio1,2,3

  • 1Balance and Vision Laboratory, Neuroscience Research Australia, Sydney, NSW, Australia.

Frontiers in Neurology
|July 18, 2018
PubMed
Summary
This summary is machine-generated.

This study introduces an affordable stereo vision system to measure center-of-mass (COM) stability, complementing force plates for better postural control analysis. The system offers precise 3D measurements, enhancing clinical and research applications.

Keywords:
center-of-masscenter-of-pressureposturographystereo visionsway

More Related Videos

Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane
07:24

Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane

Published on: August 22, 2025

555
A Graphical User Interface for Software-assisted Tracking of Protein Concentration in Dynamic Cellular Protrusions
08:12

A Graphical User Interface for Software-assisted Tracking of Protein Concentration in Dynamic Cellular Protrusions

Published on: July 11, 2017

7.8K

Related Experiment Videos

Last Updated: Feb 7, 2026

Three-Dimensional Finger Motion Tracking during Needling: A Solution for the Kinematic Analysis of Acupuncture Manipulation
08:27

Three-Dimensional Finger Motion Tracking during Needling: A Solution for the Kinematic Analysis of Acupuncture Manipulation

Published on: October 28, 2021

3.2K
Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane
07:24

Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane

Published on: August 22, 2025

555
A Graphical User Interface for Software-assisted Tracking of Protein Concentration in Dynamic Cellular Protrusions
08:12

A Graphical User Interface for Software-assisted Tracking of Protein Concentration in Dynamic Cellular Protrusions

Published on: July 11, 2017

7.8K

Area of Science:

  • Biomechanics
  • Biomedical Engineering
  • Human Movement Science

Background:

  • Computerized posturography typically uses force plates to measure center-of-pressure (COP), which reflects postural control actions but not center-of-mass (COM) stability.
  • Existing motion tracking systems for COM measurement are often expensive and complex for routine clinical use.
  • A comprehensive analysis of postural control requires simultaneous measurement of both COP and COM.

Purpose of the Study:

  • To develop and validate a cost-effective and user-friendly stereo vision system for measuring COM.
  • To assess the system's accuracy and precision in tracking a trunk-fixed target's 3D position and orientation.
  • To evaluate the system's potential as a complementary tool to force plate measurements in posturography.

Main Methods:

  • A stereo vision system was designed to track the 3D position and orientation of a trunk-fixed target.
  • The system's measurement accuracy and precision were evaluated, with specific attention to different axes and coordinates.
  • Correlation and power spectral analysis were performed between the stereo vision system's target position (TP) data and force plate-derived center-of-pressure (COP) data.

Main Results:

  • The stereo vision system demonstrated good accuracy and precision, with worst-case accuracy of 1.1 mm (depth) and 0.8° (pitch), and worst-case precision of 0.1 mm (depth) and 0.15° (roll).
  • Computer modeling accurately predicted the system's precision with a mean error of 11.3%.
  • A strong correlation (r > 0.73) was found between target position (TP) and COP, with COP generally showing larger excursions around TP. Power spectral analysis indicated TP signals were predominantly below 1.1 Hz, consistent with COM dynamics.

Conclusions:

  • The developed stereo vision system is an inexpensive and convenient complement to force plate systems for posturography.
  • This system enables a more complete analysis of postural control by measuring COM stability alongside COP.
  • Future work should focus on data interpretation, establishing normative reference values for diverse populations, and validating clinical utility.