A stricter condition for standing balance after unexpected perturbations

At L Hof; Carolin Curtze

doi:10.1016/j.jbiomech.2016.01.021

A stricter condition for standing balance after unexpected perturbations

At L Hof, Carolin Curtze

Research output: Contribution to journal › Article › Academic › peer-review

30 Citations (Scopus)

Abstract

In order to account for the dynamic nature of balance, the concept of the 'extrapolated centre of mass' XcoM has been introduced (Hof et al., 2005). The law for standing balance was then formulated as: the XcoM should remain within the Base of Support (BoS). This law, however, does not take into account that the centre of pressure (CoP) needs time to displace due to various neural and mechanical delays.

The theory is extended to include the finite reaction- and displacement time of the CoP. Experimental results on humans standing on two feet undergoing sudden postural perturbations are presented. In this case it turns out that the area of the effective BoS is only a fraction, some 30%, of the area of the static BoS. (C) 2016 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	580-585
Number of pages	6
Journal	Journal of biomechanics
Volume	49
Issue number	4
DOIs	https://doi.org/10.1016/j.jbiomech.2016.01.021
Publication status	Published - 29-Feb-2016

Keywords

Balance
Equilibrium
Base of support
Centre of mass
Centre of pressure
XcoM
CoP
CoM
DYNAMIC STABILITY
WALKING
RESPONSES
SURFACE
STANCE
ADULTS

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title = "A stricter condition for standing balance after unexpected perturbations",

abstract = "In order to account for the dynamic nature of balance, the concept of the 'extrapolated centre of mass' XcoM has been introduced (Hof et al., 2005). The law for standing balance was then formulated as: the XcoM should remain within the Base of Support (BoS). This law, however, does not take into account that the centre of pressure (CoP) needs time to displace due to various neural and mechanical delays.The theory is extended to include the finite reaction- and displacement time of the CoP. Experimental results on humans standing on two feet undergoing sudden postural perturbations are presented. In this case it turns out that the area of the effective BoS is only a fraction, some 30%, of the area of the static BoS. (C) 2016 Elsevier Ltd. All rights reserved.",

keywords = "Balance, Equilibrium, Base of support, Centre of mass, Centre of pressure, XcoM, CoP, CoM, DYNAMIC STABILITY, WALKING, RESPONSES, SURFACE, STANCE, ADULTS",

author = "Hof, {At L} and Carolin Curtze",

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doi = "10.1016/j.jbiomech.2016.01.021",

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T1 - A stricter condition for standing balance after unexpected perturbations

AU - Hof, At L

AU - Curtze, Carolin

PY - 2016/2/29

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N2 - In order to account for the dynamic nature of balance, the concept of the 'extrapolated centre of mass' XcoM has been introduced (Hof et al., 2005). The law for standing balance was then formulated as: the XcoM should remain within the Base of Support (BoS). This law, however, does not take into account that the centre of pressure (CoP) needs time to displace due to various neural and mechanical delays.The theory is extended to include the finite reaction- and displacement time of the CoP. Experimental results on humans standing on two feet undergoing sudden postural perturbations are presented. In this case it turns out that the area of the effective BoS is only a fraction, some 30%, of the area of the static BoS. (C) 2016 Elsevier Ltd. All rights reserved.

AB - In order to account for the dynamic nature of balance, the concept of the 'extrapolated centre of mass' XcoM has been introduced (Hof et al., 2005). The law for standing balance was then formulated as: the XcoM should remain within the Base of Support (BoS). This law, however, does not take into account that the centre of pressure (CoP) needs time to displace due to various neural and mechanical delays.The theory is extended to include the finite reaction- and displacement time of the CoP. Experimental results on humans standing on two feet undergoing sudden postural perturbations are presented. In this case it turns out that the area of the effective BoS is only a fraction, some 30%, of the area of the static BoS. (C) 2016 Elsevier Ltd. All rights reserved.

KW - Balance

KW - Equilibrium

KW - Base of support

KW - Centre of mass

KW - Centre of pressure

KW - XcoM

KW - CoP

KW - CoM

KW - DYNAMIC STABILITY

KW - WALKING

KW - RESPONSES

KW - SURFACE

KW - STANCE

KW - ADULTS

U2 - 10.1016/j.jbiomech.2016.01.021

DO - 10.1016/j.jbiomech.2016.01.021

M3 - Article

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SN - 0021-9290

VL - 49

SP - 580

EP - 585

JO - Journal of biomechanics

JF - Journal of biomechanics

IS - 4

ER -

A stricter condition for standing balance after unexpected perturbations

Abstract

Keywords

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