Comparison of intra-individual physiological sway complexity from force plate and inertial measurement unit

Rahul Soangra, Thurmon E. Lockhart

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Center of Pressure (COP) is a clinical measure to investigate the effect of sensory input disturbances on postural stability in the healthy, elderly population as well in people suffering from neuromuscular disease. Increased center of pressure velocity and sway area are interpreted as decreased stability or poor balance and are associated with fall risk. Body mounted inertial sensors have shown great promise as an easily implemented clinical measure of balance. The aim of the present study is to investigate if force-plate and accelerometer measurements provide similar physiological information when approximate entropy (ApEn) are evaluated from a time series. Seven young and thirteen older individuals (two with fall history and nine without any past fall) participated in this study. There were different complexity measures in healthy young and elderly participants when both force-plate and Inertial Measurement Unit (IMU) were assessed during the same time interval. Thus different control mechanisms are underlying to control trunk sway as measured by IMU than that of COP measured by force-plate.

Original languageEnglish (US)
Title of host publication50th Annual Rocky Mountain Bioengineering Symposium and 50th International ISA Biomedical Sciences Instrumentation Symposium 2013
Pages181-187
Number of pages7
StatePublished - Sep 9 2013
Externally publishedYes
Event50th Annual Rocky Mountain Bioengineering Symposium and 50th International ISA Biomedical Sciences Instrumentation Symposium 2013 - Colorado Springs, CO, United States
Duration: Apr 5 2013Apr 7 2013

Publication series

Name50th Annual Rocky Mountain Bioengineering Symposium and 50th International ISA Biomedical Sciences Instrumentation Symposium 2013
Volume493

Other

Other50th Annual Rocky Mountain Bioengineering Symposium and 50th International ISA Biomedical Sciences Instrumentation Symposium 2013
CountryUnited States
CityColorado Springs, CO
Period4/5/134/7/13

Keywords

  • Approximate Entropy
  • Complexity
  • Postural stability

ASJC Scopus subject areas

  • Bioengineering
  • Biomedical Engineering

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  • Cite this

    Soangra, R., & Lockhart, T. E. (2013). Comparison of intra-individual physiological sway complexity from force plate and inertial measurement unit. In 50th Annual Rocky Mountain Bioengineering Symposium and 50th International ISA Biomedical Sciences Instrumentation Symposium 2013 (pp. 181-187). (50th Annual Rocky Mountain Bioengineering Symposium and 50th International ISA Biomedical Sciences Instrumentation Symposium 2013; Vol. 493).