title: Hilbert-Huang transformation: application to postural stability analysis.
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.
authors.affiliation: Institut Charles Delaunay, FRE CNRS 2848, Université de technologie de Troyes (UTT), Troyes, France. hassan.amoud@utt.fr
authors.forename: Hassan
authors.initials: H
authors.lastname: Amoud
authors.forename: Hichem
authors.initials: H
authors.lastname: Snoussi
authors.forename: David J
authors.initials: DJ
authors.lastname: Hewson
authors.forename: Jacques
authors.initials: J
authors.lastname: Duchêne
mesh_terms: D000328:Adult; D000465:Algorithms; D003936:Diagnosis, Computer-Assisted / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008365:Manometry / Q000379:methods*; D010808:Physical Examination / Q000379:methods*; D004856:Postural Balance / Q000502:physiology*; D011187:Posture / Q000502:physiology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity