The sensitivity of posturographic parameters to acquisition settings

Med Eng Phys. 2002 Nov;24(9):623-31. doi: 10.1016/s1350-4533(02)00046-2.

Abstract

The objective of this study was to evaluate the sensitivity of posturographic parameters (PP) to changes in acquisition settings. A group of eight young adults underwent a set of typical orthostatic posture trials, and selected PP were then calculated from a set of centre of pressure (CoP) displacement time series obtained by applying different cut-off frequencies to the same set of raw data. Four PP out of 11 showed significant changes with respect to cut-off frequency. Statistical mechanics parameters exhibited smaller sensitivity than summary measures. On the basis of the results obtained, a proposal for a standard cut-off frequency and a sampling rate value is embodied in the paper together with some suggestions on measurement settings, with a view to standardized use of instrumentation for quantitative analysis in orthostatic posturography.

Publication types

  • Clinical Trial

MeSH terms

  • Acceleration
  • Adult
  • Analog-Digital Conversion
  • Calibration
  • Female
  • Fourier Analysis
  • Humans
  • Male
  • Movement / physiology*
  • Physical Examination / instrumentation
  • Physical Examination / methods*
  • Physical Examination / standards
  • Postural Balance / physiology*
  • Posture / physiology*
  • Pressure
  • Reproducibility of Results
  • Sensitivity and Specificity
  • Signal Processing, Computer-Assisted*
  • Stress, Mechanical