About the structure of posturography: Sampling duration, parametrization, focus of attention (part II)


There exists a great variety of posturographic parameters which complicates the evaluation of center of pressure (COP) data. Hence, recommendations were given to use a set of complementary parameters to explain most of the variance. However, it is unknown whether a dual task paradigm leads to different parametrization sets. On account of this problem an exploratory factor analysis approach was conducted in a dual task experiment. 16 healthy subjects stood on a force plate performing a posture-cognition dual task (DT, focus of attention on a secondary task) with respect to different sampling durations. The subjects were not aware of being measured in contrast to a baseline task condition (BT, internal focus of attention) in the previously published part I. In compareson to BT a different factor loading pattern appears. In addition, factor loadings are strongly affected by different sampling durations. DT reveals a change of factor loading structure with longer sampling durations compared to BT. Specific recommendations concerning a framework of posturographic parametrization are given.

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Schubert, P. , Kirchner, M. , Schmidtbleicher, D. and Haas, C. (2012) About the structure of posturography: Sampling duration, parametrization, focus of attention (part II). Journal of Biomedical Science and Engineering, 5, 508-516. doi: 10.4236/jbise.2012.59063.

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The authors declare no conflicts of interest.


[1] Fraizer, E. and Mitra, S. (2008) Methodological and interpretive issues in posture-cognition dual-tasking in up-right stance. Gait Posture, 27, 271-279. doi:10.1016/j.gaitpost.2007.04.002
[2] Visser, J.E., Carpenter, M.G., van der Kooij, H. and Bloem, B.R. (2008) The clinical utility of posturography. Clinical Neurophysiology, 119, 2424-2436. doi:10.1016/j.clinph.2008.07.220
[3] Lacour, M., Bernard-Demanze, L. and Dumitrescu, M. (2008) Posture control, aging, and attention resources: Models and posture-analysis methods. Clinical Neuro-physiology, 38, 411-421. doi:10.1016/j.neucli.2008.09.005
[4] Woollacott, M. and Shumway-Cook, A. (2002) Attention and the control of posture and gait: A review of an emerging area of research. Gait and Posture, 16, 1-14. doi:10.1016/S0966-6362(01)00156-4
[5] van der Kooij, H., Campbell, A.D. and Carpenter, M.G. (2011). Sampling duration effects on centre of pressure descriptive measures. Gait & Posture, 34, 19-24. doi:10.1016/j.gaitpost.2011.02.025
[6] Rocchi, L., Chiari, L. and Capello, A. (2004) Feature selection of stabilometric parameters based on principal component analysis. Medical & Biological Engineering & Computing, 42, 71-79. doi:10.1007/BF02351013
[7] Rocchi, L., Chiari, L., Capello, A. and Horak, F.B. (2006) Identification of distinct characteristics of postural sway in Parkinson’s disease: A feature selection procedure based on principal component analysis. Neuroscience Letters, 394, 140-145. doi:10.1016/j.neulet.2005.10.020
[8] Kitibayashi, T., Demura, S. and Noda, M. (2003) Examination of the Factor Structure of Center of Foot Pressure Movement and Cross-validity. Journal of Physiological Anthropology and Applied Human Science, 22, 265-272. doi:10.2114/jpa.22.265
[9] Huxhold, O., Li, S-C., Schmiedek, F and Lindenberger, U. (2006) Dual-tasking postural control: Aging and the effects of cognitive demand in conjunction with focus of attention. Brain Research Bulletin, 69, 294-305. doi:10.1016/j.brainresbull.2006.01.002
[10] Kapoula, Z., Matheron, E., Demule, E., Fauvel, C. and Bucci, M. (2011) Postural control during the Stroop Test in dyslexic and non dyslexic teenagers. PLoS ONE, 6, e19272. doi:10.1371/journal.pone.0019272
[11] Duarte, M. and Zatsiorsky, V.M. (1999) Patterns of center of pressure migration during prolonged unconstrained standing. Motor Control, 3, 12-27.
[12] Duarte, M., Harvey, W. and Zatsiorsky, V.M. (2000) Stabilographic analysis of unconstrained standing. Ergonomics, 43, 1824-1839. doi:10.1080/00140130050174491
[13] Pellecchia, G.L. (2003) Postural sway increases with attentional demands of concurrent cognitive task. Gait & Posture, 18, 29-34. doi:10.1016/S0966-6362(02)00138-8
[14] Bolbecker, A.R., Lee Hong, S., Kent, J.S., Klaunig, M.J., O’Donnell, B.F., Hetrick, W.P. (2011) Postural control in bipolar disorder: Increased sway area and decreased dynamical complexity. PLoS ONE, 6, e19824. doi:10.1371/journal.pone.0019824
[15] Prado, J., Stoffregen, T. and Duarte, M. (2007) Postural sway during dual tasks in young and elderly adults. Gerontology, 53, 274-281. doi:10.1159/000102938
[16] Ruhe, A., Fejer, R. and Walker, B. (2010) The test-retest reliability of centre of pressure measures in bipedal static task conditions—A systematic review of the literature. Gait & Posture, 32, 436-445. doi:10.1016/j.gaitpost.2010.09.012
[17] Maurer, C. and Peterka, R. (2005) A new interpretation of spontaneous sway measures based on a simple model of human postural control. Journal of Neurophysiology, 93, 189-200. doi:10.1152/jn.00221.2004
[18] Duarte, M. and Freitas, S. (2010) Revision of posturography based on force plate for balance evaluation. Revista Brasileira de Fisioterapia, 14, 183-192. doi:10.1590/S1413-35552010000300003
[19] Duarte, M., Freitas, S.M.S.F. and Zatsiorsky, V. (2011) Control of equilibrium in humans—Sway over sway. In: Latash, M. and Danion, F., Eds., Motor control. Oxford University Press, Oxford, 219-242.
[20] Prieto, T., Myklebust, J., Hoffmann, R., Lovett, E. and Myklebust, B. (1996) Measures of postural steadiness: Differences between healthy young and elderly adults. IEEE Transactions on Biomedical Engineering, 43, 956-966. doi:10.1109/10.532130
[21] Raymakers, J.A., Samson, M.M. and Verhaar, H.J.J. (2005) The assessment of body sway and the choice of the stability parameter(s). Gait and Posture, 21, 48-58. doi:10.1016/j.gaitpost.2003.11.006
[22] Kirchner, M., Schubert, P., Schmidtbleicher, D. and Haas, C.T. (2012) Evaluation of the temporal structure of postural sway fluctuations based on a comprehensive set of analysis tools. Physica A, 391, 4692-4703. doi:10.1016/j.physa.2012.05.034
[23] MacCallum, R. C., Widaman, K. F., Zhang, S. and Hong, S. (1999) Sample size in factor analysis. Psychological Methods, 4, 84-99. doi:10.1037/1082-989X.4.1.84
[24] Costello, A. B. and Osborne, J. W. (2005) Best practices in exploratory factor analysis: Four recommendations for getting the most from your analysis. Practical Assessment, Research & Evaluation, 10, 1-9.
[25] Hunter, M., C. and Hoffman, M., A. (2001) Postural control: Visual and cognitive manipulations. Gait and Posture, 13, 41-48. doi:10.1016/S0966-6362(00)00089-8
[26] Oliviera, L.F., Simpson, D.M. and Nadal, J. (1996) Calculation of area of stabilometric signals using principal component analysis. Physiological Measurement, 17, 305-312.doi:10.1088/0967-3334/17/4/008
[27] Kim, G.T., Ferdjallah, M. and Harris, G.F. (2009) Fast computational analysis of sway area using center of pressure data in normal children and children with cerebral palsy. American Journal of Biomedical Sciences, 1, 364- 372. doi:10.5099/aj090400364
[28] Sevsek, F. (2006) Determination of sway area by Fourier analysis of its contour. Proceedings of the 6th WSEAS International Conference on Applied Computer Science (ASC’06), Tenerife, 16-18 December 2006, 514-518.
[29] Carroll, J.P. and Freedman, W. (1993) Nonstationary properties of postural sway. Journal of Biomechanics, 26, 409-416. doi:10.1016/0021-9290(93)90004-X
[30] Ramdani, S., Seigle, B., Lagarde, J., Bouchara, F. and Bernard, P.L. (2009) On the use of sample entropy to analyze human postural sway data. Medical Engineering & Physics, 31, 1023-1031. doi:10.1016/j.medengphy.2009.06.004
[31] Kantz, H., and Schreiber, T. (2004) Nonlinear time series analysis. 2nd Edition, Cambridge University Press, Cambridge.
[32] Doyle, R.J., Ragan, B.G., Rajendran, K., Rosengren, K., S. and Hsiao-Wecksler, E.T. (2008) Generalizability of stabilogram diffusion analysis of center of pressure measures. Gait & Posture, 27, 223-230. doi:10.1016/j.gaitpost.2007.03.013
[33] Carpenter, M.G., Frank, J.S., Winter, D.A. and Peysar, G. W. (2001) Sampling duration effects on centre of pressure summary measures. Gait & Posture, 13, 35-40. doi:10.1016/S0966-6362(00)00093-X
[34] Le Clair, K. and Riach, C. (1993) Postural stability measures: What to measure and for how long. Clinical Bio-mechanics, 11, 176-178. doi:10.1016/0268-0033(95)00027-5
[35] Cannon, M., Percival, D., Caccia, D., Raymond, G. and Bassingthwaighte, J. (1997) Evaluation scaled windowed variance methods for estimating the hurst coefficient of time series. Physica A, 241, 606-626. doi:10.1016/S0378-4371(97)00252-5
[36] Rhea, C.K., Silver, T.A., Hong, S.L., Ryu, J.H., Studenka, B.E., Hughes, C.M.L. and Haddad, J.M. (2011) Noise and complexity in human postural control: Interpreting the different estimations of entropy. PLoS ONE, 6, 1-9. doi:10.1371/journal.pone.0017696
[37] Vuillerme, N. and Nafati, G. (2007) How attentional focus on body sway affects postural control during quiet standing. Psychological Research, 71, 192-200. doi:10.1007/s00426-005-0018-2
[38] Vuillerme, N. and Nougier, V. (2004) Attentional demand for regulating postural sway: The effect of expertise in gymnastics. Brain Research Bulletin, 63, 161-165. doi:10.1016/j.brainresbull.2004.02.006
[39] Lajoie, Y., Teadale, N., Bard, C. and Fleury, M. (1993) Attentional demands for static and dynamic equilibrium. Experimental Brain Research, 97, 139-144. doi:10.1007/BF00228824
[40] Dault, M.C., Frank, J.S. and Allard, F. (2001) Influence of a visuo-spatial, verbal and central executive working memory task on postural control. Gait & Posture, 14, 110-116. doi:10.1016/S0966-6362(01)00113-8
[41] Wojcik, L.A., Nussbaum, M.A., Lin, D., Shibata, P.A., Madigan, M.L. (2011) Age and gender moderate the effects of localized muscle fatigue on lower extremity joint torques used during quiet stance. Human Movement Science, 30, 574-583. doi:10.1016/j.humov.2010.03.008
[42] Moya, G.B.L., Siqueira, C.M., Caffaro, R.R., Fu, C. and Tanaka, C. (2009) Can quiet standing posture predict compensatory postural adjustment? Clinics (Sao Paulo), 64, 791-796. doi:10.1590/S1807-59322009000800014
[43] Halford, G.S., Baker, R., McCredden, J.E. and Bain, J.D. (2005) How many variables can humans process? Psychological Science, 16, 70-76. doi:10.1111/j.0956-7976.2005.00782.x

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