Center of pressure velocity reflects body acceleration rather than body velocity during quiet standing

被引:63
作者
Masani, Kei [1 ,2 ]
Vette, Albert H. [3 ,4 ]
Abe, Masaki O. [5 ]
Nakazawa, Kimitaka [6 ]
机构
[1] Univ Hlth Network, Toronto Rehabil Inst, Lyndhurst Ctr, Rehabil Engn Lab, Toronto, ON M4G 3V9, Canada
[2] Univ Toronto, Inst Biomat & Biomed Engn, Rehabil Engn Lab, Toronto, ON M4G 3V9, Canada
[3] Univ Alberta, Dept Mech Engn, Edmonton, AB T6G 2G8, Canada
[4] Glenrose Rehabil Hosp, Alberta Hlth Serv, Edmonton, AB T5G 0B7, Canada
[5] Univ Tokyo, Res Ctr Adv Sci & Technol, Meguro Ku, Tokyo 1538904, Japan
[6] Univ Tokyo, Dept Life Sci, Meguro Ku, Tokyo 1538902, Japan
基金
加拿大健康研究院; 日本学术振兴会;
关键词
Center of pressure; Human posture; Posturography; Standing; POSTURAL STEADINESS; SWAY; BALANCE; STIMULATION; STIFFNESS; YOUNG;
D O I
10.1016/j.gaitpost.2013.12.008
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
The purpose of this study was to test the hypothesis that the center of pressure (COP) velocity reflects the center of mass (COM) acceleration due to a large derivative gain in the neural control system during quiet standing. Twenty-seven young (27.2 +/- 4.5 years) and twenty-three elderly (66.2 +/- 5.0 years) subjects participated in this study. Each subject was requested to stand quietly on a force plate for five trials, each 90 s long. The COP and COM displacements, the COP and COM velocities, and the COM acceleration were acquired via a force plate and a laser displacement sensor. The amount of fluctuation of each variable was quantified using the root mean square. Following the experimental study, a simulation study was executed to investigate the experimental findings. The experimental results revealed that the COP velocity was correlated with the COM velocity, but more highly correlated with the COM acceleration. The equation of motion of the inverted pendulum model, however, accounts only for the correlation between the COP and COM velocities. These experimental results can be meaningfully explained by the simulation study, which indicated that the neural motor command presumably contains a significant portion that is proportional to body velocity. In conclusion, the COP velocity fluctuation reflects the COM acceleration fluctuation rather than the COM velocity fluctuation, implying that the neural motor command controlling quiet standing posture contains a significant portion that is proportional to body velocity. (C) 2013 Elsevier B. V. All rights reserved.
引用
收藏
页码:946 / 952
页数:7
相关论文
共 22 条
[1]   Body sway during quiet standing: Is it the residual chattering of an intermittent stabilization process? [J].
Bottaro, A ;
Casadio, M ;
Morasso, PG ;
Sanguineti, V .
HUMAN MOVEMENT SCIENCE, 2005, 24 (04) :588-615
[2]   Sampling duration effects on centre of pressure summary measures [J].
Carpenter, MG ;
Frank, JS ;
Winter, DA ;
Peysar, GW .
GAIT & POSTURE, 2001, 13 (01) :35-40
[3]   Postural balance in a random sample of 7,979 subjects aged 30 years and over [J].
Era, P. ;
Sainio, P. ;
Koskinen, S. ;
Haavisto, P. ;
Vaara, M. ;
Aromaa, A. .
GERONTOLOGY, 2006, 52 (04) :204-213
[4]   The sway-density curve and the underlying postural stabilization process [J].
Jacono, M ;
Casadio, M ;
Morasso, PG ;
Sanguineti, V .
MOTOR CONTROL, 2004, 8 (03) :292-311
[5]   Influence of visual inputs on quasi-static standing postural steadiness in individuals with spinal cord injury [J].
Lemay, Jean-Francois ;
Gagnon, Dany ;
Duclos, Cyril ;
Grangeon, Murielle ;
Gauthier, Cindy ;
Nadeau, Sylvie .
GAIT & POSTURE, 2013, 38 (02) :357-360
[6]   Direct measurement of human ankle stiffness during quiet standing: the intrinsic mechanical stiffness is insufficient for stability [J].
Loram, ID ;
Lakie, M .
JOURNAL OF PHYSIOLOGY-LONDON, 2002, 545 (03) :1041-1053
[7]   AGING AND POSTURAL CONTROL - A COMPARISON OF SPONTANEOUS-SWAY AND INDUCED-SWAY BALANCE TESTS [J].
MAKI, BE ;
HOLLIDAY, PJ ;
FERNIE, GR .
JOURNAL OF THE AMERICAN GERIATRICS SOCIETY, 1990, 38 (01) :1-9
[8]   Controlling balance during quiet standing: Proportional and derivative controller generates preceding motor command to body sway position observed in experiments [J].
Masani, K ;
Vette, AH ;
Popovic, MR .
GAIT & POSTURE, 2006, 23 (02) :164-172
[9]   Importance of body sway velocity information in controlling ankle extensor activities during quiet stance [J].
Masani, K ;
Popovic, MR ;
Nakazawa, K ;
Kouzaki, M ;
Nozaki, D .
JOURNAL OF NEUROPHYSIOLOGY, 2003, 90 (06) :3774-3782
[10]   Neuromusculoskeletal torque-generation process has a large destabilizing effect on the control mechanism of quiet standing [J].
Masani, Kei ;
Vette, Albert H. ;
Kawashima, Noritaka ;
Popovic, Milos R. .
JOURNAL OF NEUROPHYSIOLOGY, 2008, 100 (03) :1465-1475