Arnaud Gouelle

Université de Reims Champagne-Ardenne | URCA · UFR Sciences et Techniques des Activités Physiques et Sportives

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 w...

Background: Forward and backward walking are both impaired in Parkinson disease (PD). In this study, an exploratory factor analysis was performed to investigate the relationship between forward and backward walking in PD. Research Question: Given the difference in levodopa response between forward and backward walking, what is the additive value o...

To date, it has been challenging for clinicians and researchers alike to use the multiple outcome measures available to create a meaningful clinical picture and perform effective longitudinal follow-up. It has been found that instrumented gait analysis can provide information associated with a patient’s performance and help to remedy the shortcomin...

Background: Little is known about how HIV affects walking biomechanics, or about associations between HIV-related gait deviations, functional performance and self-reported outcomes. This paper reports on gait biomechanics and -variability in people with HIV (PWH), and associations with clinical tests, self-reported function and falls. Methods: A c...

Motor impairments occur frequently in genetic syndromes highly penetrant for autism spectrum disorder (syndromic ASD) and in individuals with ASD without a genetic diagnosis (nonsyndromic ASD). In particular, abnormalities in gait in ASD have been linked to language delay, ASD severity, and likelihood of having a genetic disorder. Quantitative meas...

Introduction Most people with Parkinson's disease (PD) will experience gait problems. Previous studies demonstrated improved gait and balance after vibration stimulation was applied to the feet of PD patients. However, not all study participants showed improvement, perhaps due to sub-optimal vibration stimulus. Thus far, the optimal frequency and a...

Most people with Parkinson’s disease (PD) will experience gait problems. Previous studies demonstrated improved gait and balance after vibration stimulation was applied to the feet of PD patients. However, not all study participants showed improvement, perhaps due to sub-optimal vibration stimulus. Thus far, the optimal frequency and amplitude of v...

Angelman Syndrome is a rare neurodevelopmental disorder characterized by developmental delay, lack of speech, seizures, intellectual disability, characteristic behavior, and movement disorders. Clinical gait analysis provides the opportunity for movement quantification to investigate an observed maladaptive change in gait pattern and offers an obje...

Abstract: Two-thirds of people with Multiple Sclerosis (PwMS) have walking disabilities. Considering the literature, prolonged tests, such as the 6 min walk test, better reflect their everyday life walking capacities and endurance. However, in most studies, only the distance traveled during the 6MWT was measured. This study aims to analyze spatio-t...

Background: Children with hemiplegia often demonstrate gait deviations including increased variability and asymmetry. Step-to-step gait variability decreases over childhood and increases in the presence of neurologic dysfunction. Gait variability in children with hemiplegia should therefore be interpreted in reference to age-related norms Research...

Musculoskeletal disorders and pain in the neck and shoulders are commonly reported in workers whose activities imply overhead tasks. Repetitive passive head support or traumatic movements of the neck can cause damage to the ligaments and tendons of this region, with mild to severe long-term consequences. Exoskeletons are one of the solutions to hel...

Background Angelman syndrome (AS) patients often respond to low glycemic index therapy to manage refractory seizures. These diets significantly affect quality of life and are challenging to implement. These formulations may have benefits in AS even in the absence of biomarkers suggesting ketosis. Objectives We aimed to compare an exogenous medical...

Background: Walking disorders represent the most disabling condition in persons with Multiple Sclerosis (PwMS). Several studies showed good reliability of the 6-min walk test (6MWT) (i.e., especially distance traveled), but little is known about the reliability of the Spatio-temporal (ST) variables in the 6MWT. Objective: To evaluate the test-re...

Background: In persons with Parkinson's disease (pwPD) any additional somatosensory or distractor interference can influence the posture. When deprivation of vision and dual-task are associated, the effect on biomechanical performance is less consistent. The aim of this study was to evaluate the role of the visual deprivation and a cognitive task o...

Technology-based outcomes have recently been proposed to complement the standard Four Square Step Test (FSST) by providing a decomposition of the sequences and information about the stepping pattern. A test-retest study and a randomized crossover design have been used to determine immediate test-retest reliability and to assess discriminant validit...

État de la question Les troubles de déambulation constituent pour la majorité des patients atteints de Sclérose en plaques (SEP) la limitation d’activité la plus invalidante. Dans ce contexte, des études ont évalué la reproductibilité du test de 6 minutes (TM6) chez les patients-SEP mais en ne s’intéressant en général qu’à la mesure de la distance...

L’évaluation objective des protocoles de prise en charge s’impose récemment comme un pilier de la pratique clinique et elle contribue à la recherche scientifique appliquée au domaine de la santé. Après avoir connu un essor constant au cours de la dernière décennie, les dispositifs technologiques trouvent aujourd’hui leur place au sein des plateaux...

La recherche bibliographique ou revue bibliographique, bien qu'élément essentiel à la construction d'un travail de recherche et a fortiori d'un mémoire ou d'un article, reste le plus souvent négligée par les étudiants voire les chercheurs. Il est vrai que mener correctement une revue de littérature de manière exhaustive et perspicace demande un inv...

Background: Although motor abnormalities have been flagged as potentially the most sensitive and specific clinical features for predicting the future progression to Parkinson's disease, little work has been done to characterize gait and balance impairments in idiopathic rapid eye movement sleep behavior disorder (iRBD). Objective: The objective of...

Introduction Le Four Square Step Test (FSST) évalue la capacité, essentielle pour prévenir les chutes, à franchir de petits obstacles et changer rapidement de direction. C’est une mesure chronométrée nécessitant d’enjamber des cannes pour parcourir quatre carrés. Le test présente de bonnes caractéristiques clinimétriques mais est limité par l’uniqu...

Les paramètres spatio-temporels (PST) de la marche sont devenus incontournables et sont sans doute les variables les plus étudiées en analyse clinique de la marche. Pourtant, ils restent souvent sous-exploités au regard des riches informations qu'ils peuvent fournir quant à l'organisation et au contrôle de la marche du patient. Paramètres de prime...

Comparative results for the statistical tests done in the published papers presenting GVI scores against the Enhanced Gait Variability Index (EGVI). Table A1. Pearson’s correlations with the GVI and the EGVI. Table A2. Spearman’s correlations with the GVI and the EGVI. Table A3. Spearman’s correlations with the GVI and the EGVI. Table A4. EGVI in i...

Background Angelman syndrome (AS) leads to clinical manifestations that include intellectual impairments, developmental delay and poor motor function. Initiatives to develop therapeutics implie an urgent need to identify methods that accurately measure the motor abilities. Methods Six children with AS (6 to 9 years old) walked on an instrumented w...

BACKGROUND AND AIM: Earlier work suggests that testing protocol affects gait variability measurement. Specifically, it is suggested that repeated walking protocols involving walking short distances with periodic interruptions in comparison to continuous walking protocols (walking longer distances without interruptions), may artificially inflate gai...

Spatiotemporal parameters (STP) are widely studied variables in clinical gait analysis. Yet they often remain underutilized despite the rich information they provide about organization and control of the patient’s progress. Building on them requires a broad knowledge of the “normal” gait, before to being able to understand the impact of pathologica...

INTRODUCTION Understanding steady state gait does not tell the entire story about walking in daily life. People walk forward, backward, jump, run, go up and down slopes and stairs, they cross obstacles and carry loads. Yet, before they can walk they must initiate the movement; and often overlooked, is the need for gait termination, we must be able...

The spatial and temporal parameters (STP) of the gait are nowadays unavoidable in clinical analysis. The functional analysis of how a patient is walking is a specific assessment and is listed in the French medical classification for clinical procedures. Moreover, rehabilitation and recuperative care facilities have now to get access to a gait analy...

Evaluer l’influence d’une vitesse de marche rapide sur la variabilité et l’asymétrie de la marche de patients cérébrolésés.

Introduction La variabilité de la marche représente les fluctuations des paramètres spatiotemporels (PST) d’un pas à l’autre. C’est un indicateur sensible des déficits moteurs et de contrôle de l’équilibre dynamique. Le Gait Variability Index (Gouelle et al., 2013), dérivé de neuf PST, a été proposé pour améliorer la quantification de la variabilit...

In Symposium “Are persons with spasticity after Stroke and Multiple Sclerosis more imbalanced?” by Phadke, C., Mochizuki, G., Gage, W., Gouelle, A., Sosnoff, J., Rahimzadeh-Khiabani, R., Ismail, F, & Boulias, C.

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 t...

Gait variability, defined as the fluctuation in spatiotemporal characteristics between steps, is suggested to be a sensitive indicator of mobility deficits with aging and pathological processes. A challenge in quantifying gait variability is the decision of which spatiotemporal parameters to assess because gait parameters may exhibit different amou...

Background: Gait Variability (GV), defined as variations in spatiotemporal parameters from one step to the next, is altered in older adults and shown to be an independent predictor of future falls. While GV is emerging as an important outcome measure for older adults, there are several issues limiting its clinical utility. 1) There is lack of conse...

Objective: To assess the effect of spasticity and cognitive dual-task (counting backwards) on gait variability and gait asymmetry in adults with neurological disorders. High gait variability and gait asymmetry seen in patients with neurological lesions can increase falls risk. Whether spasticity and additional cognitive loads contribute to gait var...

Gait analysis systems are widely used for the assessment of gait disabilities and provide more accurate and detailed information than clinical tests. Scores and indexes have been proposed to summarize the large volume of data produced, each emphasizing different aspects of gait. Based on specific spatiotemporal gait parameters, the Functional Ambul...

Analyse des appuis plantaires sur tapis de marche : état actuel et perspectives

Évaluer 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)...

La maîtrise de l’équilibre au cours de la marche découle d’un processus qui se poursuit jusqu’à des âges avancés de l’enfance. Sutherland (1980) a montré que la marche serait largement mature à 3 ans, bien que les paramètres spatiotemporels (PST) continuent de changer jusque 7 ans. Les modifications postérieures seraient dues à la croissance. Or, l...

Many pathologies affect balance control during gait. Traumatic, neurological or age-related disorders can all limit more or less the stability, which is the capacity of subjects to recover from perturbations, and can lead to falls. For children, the stability is related to the developmental stages and its interpretation requires differentiating wha...

Le Functional ambulation performance score (FAPS) est utilisé pour mesurer la qualité des para- mètres spatiotemporels (PST) chez l’adulte. Les auteurs ont cherché à mettre en évidence l’adé- quation de ce score avec une population d’enfants asymptomatiques. Les PST ont été enregistrés chez 32 enfants répar- tis par groupes d’âge, via la piste de m...

Gait characteristics of a healthy adult population have been used to develop the Functional Ambulation Profile (FAP) score to evaluate gait in patients with neuromuscular or musculoskeletal involvement (A. J. Nelson, 197414. Moreno-Hernandez , A. , Rodriguez-Reyes , G. , Quinones-Uriostegui , G. , Nunez-Carrera , L. and Perez-SanPablo , A. I....

Les paramètres spatiotemporels (PST) renseignent sur la façon dont le patient organise sa marche et met en évidence la nature du contrôle moteur mis en oeuvre pour la réaliser. Le Functional Ambulation Performance Score (FAPS), récemment validé chez l’enfant de plus de 12 ans [1], quantifie par un seul nombre l’écart à la norme de ces PST. Un nouve...

Les paramètres spatiotemporels (PST) sont les paramètres quantifiables les plus utilisés pour évaluer la marche et estimer le risque de chute. Deux aspects de l’équilibre - que nous nommerons en nous inspirant de la sémantique utilisée en posturologie pour étudier l’équilibre statique [1] - doivent être pris en compte : « steadiness » et « stabilit...

Disposer d’un outil permettant d’évaluer rapidement la marche d’un sujet se révèle fortement utile dans la pratique clinique quotidienne. Ainsi, tenter de résumer un ensemble de paramètres de la marche en un seul score ou index a toujours été un champ de recherche prolifique. Concernant les paramètres spatiotemporels de la marche, Nelson a introdui...

Disposer d’un outil pour évaluer rapidement la marche se révèle utile dans la pratique clinique quotidienne. En ce qui concerne les paramètres spatiaux et temporels de la marche, Nelson a introduit un score, le Functional Ambulation Profile. Méthode papier crayon à l’origine (Nelson, 1974), le FAP a évolué avec les technologies d’analyse de la marc...

L'analyse du mouvement est un domaine en plein essor auquel les cliniciens portent de plus en plus d'intérêt. Ainsi, plusieurs structures hospitalières et cliniques se sont dotées de centres spécialisés pour analyser la marche pathologique. Mais qu'est-ce qui distingue la marche pathologique de la marche « normale » ? En quoi des méthodes d'analyse...

Que ce soit chez l’enfant IMC ou la personne âgée, il est courant d’observer une instabilité pendant la marche pouvant accroître le risque de chute. De nombreux auteurs ont cherché à identifier des paramètres déterminant la stabilité, principalement chez les sujets âgés chuteurs [2, 3], moins chez l’enfant [1] ; pourtant il n’existe actuellement au...

Schutte et al. (2000) ont proposé récemment un nouvel index, le Gillette Gait Index, pour caractériser simplement la marche d'un sujet dans un sens global. Ce nombre sans dimension calculé à partir de seize paramètres de la marche acquis pendant l'analyse quantifiée. Les paramètres de base de la marche ont été utilisés chez les parkinsoniens adulte...

Le but de cette étude est d'évaluer l'impact du port de différents types d'appareillages de genou (orthèses, strapping) sur la cinématique de la marche de sujets en période de rééducation post ligamentoplastie du ligament croisé antérieur (LCA). Un système optoélectronique nous a permis de capturer le mouvement pendant la phase d'initiation de la m...