Hilbert-Huang Transformation: Application to Postural Stability Analysis

Author

Amoud, H. ; Snoussi, H. ; Hewson, D.J. ; Duchene, J.

Author_Institution

Univ. de Technol. de Troyes (UTT), Troyes

fYear

2007

fDate

22-26 Aug. 2007

Firstpage

1562

Lastpage

1565

Abstract

The aim objective of this paper is the analysis of the centre of pressure (COP) time series by the means of the Hilbert Huang Transformation (HHT). The HHT consists of extracting the intrinsic mode functions (IMFs) from an empirical mode decomposition (EMD), and then applying the Hilbert transformation on the IMFs. The trace of the HHT in the complex plane has a circular form, with each IMF having its own rotation frequency. The area of the circle represents a possible indicator of the postural stability status of the subjects. Experimental results show the effectiveness of the area of this circle in order to identify the post-vibratory effects on standing posture in healthy adult subjects.

Keywords

Hilbert transforms; mechanical stability; mechanoception; time series; vibrations; Hilbert-Huang transformation; area of circle indicator; centre of pressure time series; empirical mode decomposition; healthy adult subjects; intrinsic mode functions; post-vibratory effects; postural stability analysis; standing posture; Control systems; Data mining; Displacement measurement; Force measurement; Frequency; Muscles; Pressure measurement; Stability analysis; Tendons; Time measurement; Adult; Algorithms; Diagnosis, Computer-Assisted; Female; Humans; Male; Manometry; Physical Examination; Postural Balance; Posture; Reproducibility of Results; Sensitivity and Specificity;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 2007. EMBS 2007. 29th Annual International Conference of the IEEE

Conference_Location

Lyon

ISSN

1557-170X

Print_ISBN

978-1-4244-0787-3

Type

conf

DOI

10.1109/IEMBS.2007.4352602

Filename

4352602