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Related Experiment Video

Updated: Jul 10, 2026

Experimental Methods to Study Human Postural Control

Experimental Methods to Study Human Postural Control

Published on: September 11, 2019

Hilbert-Huang transformation: application to postural stability analysis.

Hassan Amoud¹, Hichem Snoussi, David J Hewson

¹Institut Charles Delaunay, FRE CNRS 2848, Université de technologie de Troyes (UTT), Troyes, France. hassan.amoud@utt.fr

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference

|November 16, 2007

Summary

The Hilbert Huang Transform analyzes Centre of Pressure (COP) data. The circular trace area effectively indicates postural stability changes after vibration exposure in adults.

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Area of Science:

Biomechanics
Signal Processing
Human Posture Analysis

Background:

Postural stability is crucial for daily activities.
Vibration exposure can negatively impact balance.
Objective measures are needed to assess postural control.

Purpose of the Study:

To analyze Centre of Pressure (COP) time series using Hilbert Huang Transform (HHT).
To investigate the HHT's circular trace area as an indicator of postural stability.
To evaluate the method's effectiveness in detecting post-vibratory effects on standing posture.

Main Methods:

Empirical Mode Decomposition (EMD) to extract Intrinsic Mode Functions (IMFs).
Hilbert Transformation applied to IMFs.
Calculation of the circular trace area from HHT in the complex plane.

Main Results:

Each IMF exhibited a unique rotation frequency.
The HHT trace formed a circular shape.
The area of this circle effectively identified post-vibratory effects on standing posture.

Conclusions:

The HHT method provides a novel approach to analyze COP data.
The circular trace area is a sensitive indicator of postural stability.
This technique can be valuable for assessing balance in various conditions.