Postural and trunk responses to unexpected perturbations depend on the velocity and direction of platform motion

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15510%2F16%3A33159143" target="_blank" >RIV/61989592:15510/16:33159143 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.biomed.cas.cz/physiolres/pdf/65/65_769.pdf" target="_blank" >http://www.biomed.cas.cz/physiolres/pdf/65/65_769.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Postural and trunk responses to unexpected perturbations depend on the velocity and direction of platform motion

Popis výsledku v původním jazyce

This study compares postural and trunk responses to translating platform perturbations of varied velocity and direction. A group of 18 young and active subjects were exposed to a set of postural perturbations at varied velocities (5, 10, 15, and 20 cm/s) and directions of platform movement (forward, backward, left-lateral, and right-lateral). The center of pressure (CoP) displacement measurement, in addition to the trunk motion (representing the center of mass (CoM) displacement), were both monitored. Results identified that the CoP displacement increased from slow to faster velocities of platform motion more widely in both anterior and posterior directions (50.4% and 48.4%) as compared to the CoM displacement (17.8% and 14.9%). A greater increase in the peak CoM velocity (70.3% and 69.6%) and the peak CoM acceleration (60.5% and 53.1%) was observed. The values in the anterior and posterior direction only differed significantly at the highest velocity of platform motion (i.e. 20 cm/s). A similar tendency was observed in the medio-lateral direction, but there were no significant differences in any parameter in the left-lateral and right-lateral direction. The velocity of the platform motion highly correlated with peak velocity (r = 0.92-0.97, p < 0.01) and moderately with amplitude of trunk displacement (r = 0.56-0.63, p < 0.05). These findings indicate that the velocity of perturbation significantly alters peak CoM velocity rather than the magnitude of CoM displacement. The effect of the direction of perturbations on the trunk response emerges only at a high velocity of platform motion, such that the peak CoM velocity and peak CoM acceleration are significantly greater in anterior than posterior direction.

Název v anglickém jazyce

Postural and trunk responses to unexpected perturbations depend on the velocity and direction of platform motion

Popis výsledku anglicky

This study compares postural and trunk responses to translating platform perturbations of varied velocity and direction. A group of 18 young and active subjects were exposed to a set of postural perturbations at varied velocities (5, 10, 15, and 20 cm/s) and directions of platform movement (forward, backward, left-lateral, and right-lateral). The center of pressure (CoP) displacement measurement, in addition to the trunk motion (representing the center of mass (CoM) displacement), were both monitored. Results identified that the CoP displacement increased from slow to faster velocities of platform motion more widely in both anterior and posterior directions (50.4% and 48.4%) as compared to the CoM displacement (17.8% and 14.9%). A greater increase in the peak CoM velocity (70.3% and 69.6%) and the peak CoM acceleration (60.5% and 53.1%) was observed. The values in the anterior and posterior direction only differed significantly at the highest velocity of platform motion (i.e. 20 cm/s). A similar tendency was observed in the medio-lateral direction, but there were no significant differences in any parameter in the left-lateral and right-lateral direction. The velocity of the platform motion highly correlated with peak velocity (r = 0.92-0.97, p < 0.01) and moderately with amplitude of trunk displacement (r = 0.56-0.63, p < 0.05). These findings indicate that the velocity of perturbation significantly alters peak CoM velocity rather than the magnitude of CoM displacement. The effect of the direction of perturbations on the trunk response emerges only at a high velocity of platform motion, such that the peak CoM velocity and peak CoM acceleration are significantly greater in anterior than posterior direction.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

AK - Sport a aktivity volného času

OECD FORD obor

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Projekt

<a href="/cs/project/7AMB14SK073" target="_blank" >7AMB14SK073: Inovace metod posuzování stability stoje a trupu sloužících ke zlepšení výkonnosti a prevenci zranění</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physiological Research (print)

ISSN

0862-8408

e-ISSN

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Svazek periodika

65

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

8

Strana od-do

769-776

Kód UT WoS článku

000389223400006

EID výsledku v databázi Scopus

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