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

Relative Motion Analysis - Velocity01:24

Relative Motion Analysis - Velocity

529
A stroke engine has a slider-crank mechanism that converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider.
When an external force is exerted, it sets the crank into a rotational movement. This, in turn, instigates the motion of the connecting rod, leading to what is referred to as a general plane motion. This process involves two key points - point A on the connecting rod...
529
Relative Motion Analysis - Acceleration01:10

Relative Motion Analysis - Acceleration

586
A slider-crank mechanism converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider. The movement of the slider-crank is an example of general plane motion as the fluctuating angle between the crank and the connecting rod. Consider a segment AB where point A is at the end of the slider and point B is on the diametrically opposite end to point A, on a crack. The variance in...
586
Absolute Motion Analysis- General Plane Motion01:24

Absolute Motion Analysis- General Plane Motion

384
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...
384
Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

640
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
640
Relative Motion Analysis using Rotating Axes - Acceleration01:22

Relative Motion Analysis using Rotating Axes - Acceleration

514
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame. The absolute velocity of point B is determined by adding the absolute velocity of point A, the relative velocity of point B in the rotating frame, and the effects caused by the angular velocity within the rotating frame.
Time differentiation is...
514
Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

1.8K
Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and signal-to-noise ratio for the analyte. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.
Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called collision-induced...
1.8K

You might also read

Related Articles

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

Sort by
Same author

The Reliability of Photograph-Based Digital Measurements for Assessing the Pediatric Elbow Range of Motion-A Pilot Study.

Children (Basel, Switzerland)·2026
Same author

Position of Swing-Phase Foot Relative to Stance-Phase Foot at Minimum Toe Clearance: The Effect of Walking Speed.

Journal of applied biomechanics·2026
Same author

Body-weight support is the primary driver of elevated walking cost in cerebral palsy.

Research square·2026
Same author

The Effect of Transphyseal Rigid Tibial Nailing on Proximal Tibial Morphology in Pediatric Patients With at Least 1 Year of Growth Remaining.

Journal of pediatric orthopedics·2026
Same author

Exploring the utility of dynamic motor control to assess recovery following pediatric traumatic brain injury: A pilot study.

PloS one·2026
Same author

Influence of body weight support on motor control in typically developing children and children with cerebral palsy.

Journal of biomechanics·2026

Related Experiment Video

Updated: Nov 12, 2025

Multifunctional Setup for Studying Human Motor Control Using Transcranial Magnetic Stimulation, Electromyography, Motion Capture, and Virtual Reality
08:09

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

Published on: September 3, 2015

11.2K

Synergies analysis produces consistent results between motion analysis laboratories.

Bruce A MacWilliams1, Mark L McMulkin2, Adam Rozumalski3

  • 1Shriners Hospitals for Children, Salt Lake City, UT, United States; Department of Orthopaedic Surgery, University of Utah, Salt Lake City, UT, United States.

Gait & Posture
|March 16, 2021
PubMed
Summary

A standardized method for calculating the dynamic motor control index during walking (walk-DMC) ensures consistent results across laboratories. This approach improves the reliability of gait analysis for patient outcomes.

Keywords:
Motor controlSynergyWalk-DMC

More Related Videos

Isokinetic Robotic Device to Improve Test-Retest and Inter-Rater Reliability for Stretch Reflex Measurements in Stroke Patients with Spasticity
08:40

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

7.7K
Combining Multiple Data Acquisition Systems to Study Corticospinal Output and Multi-segment Biomechanics
08:48

Combining Multiple Data Acquisition Systems to Study Corticospinal Output and Multi-segment Biomechanics

Published on: January 9, 2016

7.1K

Related Experiment Videos

Last Updated: Nov 12, 2025

Multifunctional Setup for Studying Human Motor Control Using Transcranial Magnetic Stimulation, Electromyography, Motion Capture, and Virtual Reality
08:09

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

Published on: September 3, 2015

11.2K
Isokinetic Robotic Device to Improve Test-Retest and Inter-Rater Reliability for Stretch Reflex Measurements in Stroke Patients with Spasticity
08:40

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

7.7K
Combining Multiple Data Acquisition Systems to Study Corticospinal Output and Multi-segment Biomechanics
08:48

Combining Multiple Data Acquisition Systems to Study Corticospinal Output and Multi-segment Biomechanics

Published on: January 9, 2016

7.1K

Area of Science:

  • Biomechanics
  • Gait Analysis
  • Motor Control

Background:

  • The dynamic motor control index during walking (walk-DMC) is a key metric for assessing lower extremity motor control during gait.
  • Existing literature shows inconsistent methods for computing walk-DMC, hindering its widespread adoption in clinical practice.
  • There is growing interest from motion analysis centers in utilizing walk-DMC for patient outcome assessment.

Purpose of the Study:

  • To propose and validate a standardized method for computing the walk-DMC.
  • To assess the inter-laboratory consistency of the proposed walk-DMC calculation method.
  • To compare the proposed method with previously published approaches.

Main Methods:

  • Electromyographic analysis of lower extremity during gait.
  • Comparison of typically developing controls from three independent motion analysis centers.
  • Utilized a freely available program script for walk-DMC computation.

Main Results:

  • The proposed standardized method demonstrated high consistency across the three participating centers.
  • The new method resulted in a wider distribution of walk-DMC values compared to prior methods.
  • Synergy measures were equivalent between centers when using consistent processing methods.

Conclusions:

  • Standardized processing methods ensure equivalent synergy measures across different laboratories.
  • The proposed walk-DMC calculation method enhances inter-laboratory reliability for gait analysis.
  • Differences in reported walk-DMC values are largely attributable to trial concatenation techniques.