Related Experiment Video
Updated: May 14, 2026
14:52
Computerized Dynamic Posturography for Postural Control Assessment in Patients with Intermittent Claudication
Published on: December 11, 2013
Cross-correlation between head acceleration and stabilograms in humans in orthostatic posture
Felipe G Teixeira1, Igor R T Jesus, Roger G T Mello
1Programa de Engenharia Biomédica, COPPE, Universidade Federal do Riode Janeiro, Rio de Janeiro, RJ, Brazil. fegute@peb.ufrj.br
Summary
This study investigated vestibular system
Area of Science:
- Neuroscience
- Biomechanics
- Human Physiology
Background:
- Postural sway control is crucial for stability.
- The vestibular system's role in dynamic postural control is not fully understood.
- Head movements are linked to postural adjustments.
Purpose of the Study:
- To evaluate the vestibular system's contribution to postural sway control.
- To correlate head accelerations with body sway using advanced analytical methods.
Main Methods:
- Utilized a stabilometric test with a force platform and a 3-axial accelerometer on the head.
- Monitored 19 healthy young males under four sensory conditions (eyes open/closed, feet apart/together).
- Employed normalized cross-correlation function (NCCF) and Monte Carlo simulations.
Main Results:
- Significant normalized cross-correlation (NCCF) was infrequent, especially with eyes open.
- NCCF was observed in a subset of participants with eyes closed and a reduced base of support.
- No significant time-delayed responses were detected between head acceleration and body sway.
Conclusions:
- Classical negative feedback mechanisms may be absent in this context.
- Phasic displacements or anticipatory control strategies might be involved in postural adjustments.
- Vestibular system's role in postural sway requires further investigation, as results were inconclusive.
Related Concept Videos
01:25Correlation 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...
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...
01:12Measuring Acceleration Due to Gravity
Consider a coffee mug hanging on a hook in a pantry. If the mug gets knocked, it oscillates back and forth like a pendulum until the oscillations die out.
A simple pendulum can be described as a point mass and a string. Meanwhile, a physical pendulum is any object whose oscillations are similar to a simple pendulum, but cannot be modeled as a point mass on a string because its mass is distributed over a larger area. The behavior of a physical pendulum can be modeled using the principles of...
A simple pendulum can be described as a point mass and a string. Meanwhile, a physical pendulum is any object whose oscillations are similar to a simple pendulum, but cannot be modeled as a point mass on a string because its mass is distributed over a larger area. The behavior of a physical pendulum can be modeled using the principles of...