Objective measurement of dynamic balance function by the simultaneous measurement of the center of gravity (COG) and center of pressure (COP)

Masahiko Mukaino, Fumihiro Matsuda, Ryoma Sassa, Kei Ohtsuka, Nobuhiro Kumazawa, Kazuhiro Tsuchiyama, Shigeo Tanabe, Eiichi Saitoh

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

Abstract

Although a posturography is commonly used for objective evaluation of static balance function, dynamic balance function is usually evaluated only with clinical scales. Simplified objective measurement systems for the evaluation of dynamic balance function need to be developed. In this preliminary study, we attempted to develop an index for the objective measurement of dynamic balance function from COP-COG data. The subjects comprised nine hemiparetic post-stroke patients and five healthy subjects. The simultaneous measurements of COG and COP were performed using a three-dimensional motion analysis system (Kinema-tracer, KisseiComtec, Japan) combined with force plate analysis. As indices for evaluating dynamic balance function, the latency of COP passing COG after heel contact (LCP) and the averaged |COP| − |COG| subtraction value during stance phase (ASV) were calculated. For evaluating validity of the measurement, the Berg Balance Scale, a frequently used clinical balance scale, was used. The results showed significant differences (0.13 ± 0.02 vs. 0.29 ± 0.23 s) between the healthy subjects and patients in LCP, and large, yet insignificant, differences (4.3 ± 0.5 vs. 2.7 ± 2.0 cm) in ASV. The ASV was strongly correlated with BBS. A strong correlation was observed between COG acceleration and ASV, except in one patient, who had a severe balance disorder. These results may encourage further investigation into the feasibility of COP-COG measurements for balance measurement.

Original languageEnglish
Title of host publicationIntelligent Autonomous Systems 14 - Proceedings of the 14th International Conference IAS-14
EditorsWeidong Chen, Hesheng Wang, Koh Hosoda, Emanuele Menegatti, Masahiro Shimizu
PublisherSpringer Verlag
Pages69-75
Number of pages7
ISBN (Print)9783319480350
DOIs
Publication statusPublished - 2017
Event14th International Conference on Intelligent Autonomous Systems, IAS 2016 - Shanghai, China
Duration: 03-07-201607-07-2016

Publication series

NameAdvances in Intelligent Systems and Computing
Volume531
ISSN (Print)2194-5357

Other

Other14th International Conference on Intelligent Autonomous Systems, IAS 2016
CountryChina
City Shanghai
Period03-07-1607-07-16

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Computer Science(all)

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