Skip to main content

A Statistical Approach for Studying the Power Spectrum of the Center of Pressure Displacement for Subjects in Orthostatic Posture

  • Conference paper
  • 104 Accesses

Part of the IFMBE Proceedings book series (IFMBE,volume 18)

Abstract

Postural control assessment by visual feedback in health population is still controversial. This works aims at investigating the influence of the visual system on the power spectra estimates (Ŝ(f)) of the center of pressure displacement (COP) using two distinct protocols: eyes open (EO) and closed (EC). Subjects (N = 144) were submitted to stabilometric test, with 30 s in each eyes condition. Ŝ(f) was estimated for the anterior-posterior stabilometric signal using the Bartlett periodogram method for both eyes condition. The Spectral F-Test (SFT) was then applied to test the null hypothesis (H0) of same power contribution at each spectral frequency and in the frequency band Δf = 0.1–0.3 Hz. While for 69.4% of subjects H0 within this band has been accepted, for 40 subjects this hypothesis was rejected (SFTf) < 0.06). In the latter cases, the Romberg quotient of the sway area of the bandpassed (0.1–0.3 Hz) signals resulted in higher values (median of 386.66) than that obtained without filtering. Thus, it is suggested the use of the spectral F-Test and band-pass filtering for assessing differences between the sway in different protocols.

Keywords

  • Center of Pressure Displacement
  • Postural Control
  • Spectral Analysis
  • Spectral F-Test
  • Visual System

This is a preview of subscription content, access via your institution.

Buying options

Chapter
USD   29.95
Price excludes VAT (USA)
  • DOI: 10.1007/978-3-540-74471-9_14
  • Chapter length: 5 pages
  • Instant PDF download
  • Readable on all devices
  • Own it forever
  • Exclusive offer for individuals only
  • Tax calculation will be finalised during checkout
eBook
USD   469.00
Price excludes VAT (USA)
  • ISBN: 978-3-540-74471-9
  • Instant PDF download
  • Readable on all devices
  • Own it forever
  • Exclusive offer for individuals only
  • Tax calculation will be finalised during checkout
Softcover Book
USD   599.99
Price excludes VAT (USA)

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Ônell A (2000) The vertical ground reaction force for analysis of balance? Gait Posture 12:7–13 DOI 10.1016/S0966-6362(00)00053-9

    CrossRef  Google Scholar 

  2. Rougier P (2003) The influence of having the eyelids open or closed on undisturbed postural control. Neurosci Res 47:73–83 DOI 10.1016/S0168-0102(03)00187-1

    CrossRef  Google Scholar 

  3. Carroll J P, Freedman W (1993) Non-stationary properties of postural sway. J Biomech 26:409–416 DOI 10.1016/0021-9290(93)90004-X

    CrossRef  Google Scholar 

  4. Ferdjallah M, Harris G F, Wertsch J J (1999) Instantaneous postural stability characterization using time-frequency analysis. Gait & Posture 10:129–134 DOI 10.1016/S0966-6362(99)00023-5

    CrossRef  Google Scholar 

  5. Newell K M, Slobounov S M, Slobounova B S et al. (1997) Short-term non-stationarity and the development of posture control. Gait & Posture 6:56–62 DOI 10.1016/S0966-6362(96)01103-4

    CrossRef  Google Scholar 

  6. Blaszczyk J W, Bacik B, Juras G (2003) Clinical assessment of postural stability. J Mech Med and Biol 3:135–144 DOI:10.1142/S0219519403000715

    CrossRef  Google Scholar 

  7. Schumann T, Redfern M S, Furman J M et al. (1995) Timefreqncy analysis of postural sway. J Biomech 28:603–607 DOI 10.1016/0021-9290(94)00113-I

    CrossRef  Google Scholar 

  8. Duarte M, Zatsiorsky V M (2002) Effects of body lean and visual information on the equilibrium maintenance during stance. Exp Brain Res 146:60–69 DOI 10.1007/s00221-002-1154-1

    CrossRef  Google Scholar 

  9. Silva, P J G, Nadal J, Infantosi A F C (2006) The role of vision in the body sway control: the elliptical sway area and the Romberg’s quotient of the stabilometric signal [In Portuguese]. Rev Bras Eng Biomed 22:13–22

    Google Scholar 

  10. Shiavi R (1999) Introduction to applied statistical signal analysis. Academic Press, London

    Google Scholar 

  11. Kay S M (1998) Fundamental of statistical signal processing: detection theory. Prentice-Hall, New Jersey

    Google Scholar 

  12. Caron O, Faurel B, Brenieres Y (1997) Estimating the centre of gravity of the body on the basis of centre of pressure in standing posture. J Biomech 30:1169–1171 DOI 10.1016/S0021-9290(97)00094-8

    CrossRef  Google Scholar 

  13. Rougier P (2003) Visual feedback induces opposite effects on elementary centre of gravity and centre of pressure minus centre of gravity motions in undisturbed upright stance. Clin Biomech 18:341–349 DOI 10.1016/S0268-0033(03)00003-2

    CrossRef  Google Scholar 

  14. Bizzo G, Guillet N, Patat A et al (1985) Specifications for building a vertical force platform designed for clinical stabilometry. Med Biol Eng Comp 23:474–476

    CrossRef  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Editor information

Editors and Affiliations

Rights and permissions

Reprints and Permissions

Copyright information

© 2007 Springer-Verlag Berlin Heidelberg

About this paper

Cite this paper

Da Silva, P.J.G., Infantosi, A.F.C., Nadal, J. (2007). A Statistical Approach for Studying the Power Spectrum of the Center of Pressure Displacement for Subjects in Orthostatic Posture. In: Müller-Karger, C., Wong, S., La Cruz, A. (eds) IV Latin American Congress on Biomedical Engineering 2007, Bioengineering Solutions for Latin America Health. IFMBE Proceedings, vol 18. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-74471-9_14

Download citation

  • DOI: https://doi.org/10.1007/978-3-540-74471-9_14

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-74470-2

  • Online ISBN: 978-3-540-74471-9

  • eBook Packages: EngineeringEngineering (R0)