Le Gait Variability Index

Addressing limitations of the Gait Variability Index to enhance its applicability: The enhanced GVI

Arnaud Gouelle, Linda Rennie, David J ClarkShow, Fabrice Mégrot, Chitralakshmi Balasubramanian   Prior research has established the Gait Variability Index (GVI) as a composite measure of gait variability, based on spatiotemporal parameters, that is associated with functional outcomes. However, under certain circumstances the magnitude and directional specificity of the GVI is adversely affected by shortcomings in the calculation method. Here we present an enhanced gait variability index (EGVI) that addresses those shortcomings and improves the utility of the measure. The EGVI was further enhanced by removing some input spatiotemporal variables that captured overlapping/redundant information. The EGVI was used to reanalyze…
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Changes in Gait Variability From First Steps to Adulthood: Normative Data for the Gait Variability Index

Gouelle A (1), Leroux J (2), Bredin J (3), Mégrot F (4)(5).
J Mot Behav. 2015 Sep 21:1-7.

The process of learning to walk is ongoing throughout childhood. The Gait Variability Index (GVI ; A. Gouelle et al., 2013) has been proposed to quantify the variability of spatiotemporal parameters (STP) during gait. The authors’ aim was to evaluate the GVI and STP of healthy children and teenagers to (a) determine changes in the GVI with age and to derive normal values in children and (b) to evaluate the influence of STP on the GVI. A total of 140 typically developing children from 1 to 17 years old were categorized into 7 groups of 20 based on age. Spatiotemporal gait parameters were recorded using an electronic walkway. GVI increased and STP changed with age. In the children-teenagers group, the GVI was positively related to step length, speed, and negatively to cadence. Following normalization by lower limb length, correlations were no longer significant. In contrast, raw base of support was not correlated with the GVI but normalized base of support was. A multiple linear regression showed that only age had a direct impact on the GVI, indicating that gait continues to change after 6-7 years. These changes were only demonstrated by the GVI, highlighting its usefulness for the evaluation of gait in young populations.

Le Gait Variability Index – Un nouvel indice pour quantifier le risque de chute. Application chez l’enfant souffrant de paralysie cérébrale

Evaluer la stabilité au cours la marche peut non seulement fournir d’importantes indications dans le suivi thérapeutique, mais aussi améliorer la détection des patients à risque de chute. La reproductibilité des paramètres spatio-temporels d’un cycle de marche à l’autre est considérée comme le reflet de la stabilité. Le Gait Variability Index (GVI), nouvel indice récemment présenté, mesure la variabilité des paramètres spatio-temporels. La minimisation de la variabilité des paramètres spatio-temporels permet de quantifier la stabilité de la marche. Pour apprécier la pertinence du GVI dans le suivi des enfants souffrant de paralysie cérébrale, les liens entre le GVI et les…
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Le Gait Variability Index

Thèse de Arnaud GOUELLE, responsable de plate-forme d’analyse du mouvement de l’Hôpital Robert Debré (Paris) : DEVELOPPEMENT D’UN SCORE DE STABILITE CHEZ LES PERSONNES PRESENTANT DES PATHOLOGIES D’ORIGINE NEUROLOGIQUE ENTRAINANT DES TROUBLES DE LA MARCHE ET/OU DE L’EQUILIBRE Sous la direction du Pr. G.F. PENNECOT, du Pr. A. YELNIK et de M. F. MEGROT. De nombreux troubles ont un retentissement sur le contrôle de l’équilibre dynamique au cours de la marche. Qu’ils soient d’origine traumatique, neurologique, ou liés à la sénescence, ils limitent plus ou moins la stabilité, c’est-à-dire la capacité des sujets à récupérer de perturbations internes ou externes,…
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