References of "Forthomme, Bénédicte"
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See detailMerging multi-camera data to reduce motion analysis instrumental errors using Kalman filters
Schwartz, Cédric ULg; Denoël, Vincent ULg; Forthomme, Bénédicte ULg et al

in Computer Methods in Biomechanics and Biomedical Engineering (2013)

In motion capture systems, markers are often seen by multiple cameras. All cameras do not measure the position of the markers with the same reliability because of environmental factors such as the ... [more ▼]

In motion capture systems, markers are often seen by multiple cameras. All cameras do not measure the position of the markers with the same reliability because of environmental factors such as the position of the marker in the field of view or the light intensity received by the cameras. Kalman filters offer a general framework to take the reliability of the various cameras into account and consequently improve the estimation of the marker position. The proposed process can be applied to both passive and active systems. Several reliability models of the cameras are compared for the Codamotion active system, which is considered as a specific illustration. The proposed method significantly reduces the noise in the signal, especially at long range distances. Therefore, it improves the confidence of the positions at the limits of the field of view. [less ▲]

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See detailDominance effect on scapula 3-dimensional posture and kinematics in healthy male and female populations
Schwartz, Cédric ULg; Croisier, Jean-Louis ULg; Rigaux, Elise et al

in Journal of Shoulder and Elbow Surgery (2013), (0), -

Background: The contralateral shoulder is often used as a reference when evaluating a pathological shoulder. However literature provides contradictory results regarding the symmetry of the scapular ... [more ▼]

Background: The contralateral shoulder is often used as a reference when evaluating a pathological shoulder. However literature provides contradictory results regarding the symmetry of the scapular pattern in a healthy population. We assume that several factors including the gender and the type of motion may influence the scapula bilateral symmetry. Method: The dominant and non dominant shoulders of two populations of men and women composed of 11 subjects each were evaluated for three distinct motions: flexion in the sagittal plane, abduction in the frontal plane and gleno-humeral internal/external rotation with the arm abducted at 90°. Posture, kinematic and range of motion were studied separately. Results: Asymmetries are observed for motions performed in the frontal and sagittal plane but not for the internal/external rotation with the arm abducted at 90°. Multiplane asymmetries are observed for the male population, whereas asymmetries for the female one are mainly uniplanar. For both men and women, the scapula has a larger upward rotation on the dominant side. For men, a larger posterior tilt is also observed. The asymmetries mainly originate in the scapula kinematic and not in its original posture. Discussion: Even if the asymmetries are not large in terms of amplitude (inferior to 5°), one should be aware of their existence and the influence of the composition of the studied population when using the contralateral shoulder as a reference. [less ▲]

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See detailShoulder Pain among High-Level Volleyball Players and Preseason Features
Forthomme, Bénédicte ULg; Wieczorek, Valérie; Frisch, Anne et al

in Medicine & Science in Sports & Exercise (2013), 45(10), 1852-1860

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See detailShoulder injury prevention in sports using 3D motion capture
Schwartz, Cédric ULg; HAZEE, Amandine ULg; Denoël, Vincent ULg et al

Poster (2012, December 07)

In sports, where regular and intensive training could progressively lead to traumatic situations, accurate measurement of kinematic parameters can help to predict and anticipate injuries. Overhead ... [more ▼]

In sports, where regular and intensive training could progressively lead to traumatic situations, accurate measurement of kinematic parameters can help to predict and anticipate injuries. Overhead throwing athletes may develop an increased stiffness of the shoulder capsule. The resulting diminution of the gleno-humeral range of motion is usually associated with decreased performance and injury risks. This study illustrates the detection of these situations that put the athlete at risk. [less ▲]

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See detailValidated Extraction of Gait Events from 3D Accelerometer Recordings
Boutaayamou, Mohamed ULg; Schwartz, Cédric ULg; Stamatakis, Julien et al

in IEEE International Conference on 3D Imaging (IC3D) (2012, December)

This work is part of a project that deals with the three-dimensional (3D) analysis of normal and pathological gaits based on a newly developed system for clinical applications, using low-cost wireless ... [more ▼]

This work is part of a project that deals with the three-dimensional (3D) analysis of normal and pathological gaits based on a newly developed system for clinical applications, using low-cost wireless accelerometers and a signal processing algorithm. This system automatically extracts relevant gait events such as the heel strikes (HS) and the toe-offs (TO), which characterize the stance and the swing phases of walking. The performances of the low-cost accelerometer hardware and related algorithm have been compared to those obtained by a kinematic 3D analysis system and a force plate, used as gold standard methods. The HS and TO times obtained from the gait data of 7 healthy volunteers (147 trials) have been found to be (mean ± standard deviation) 0.42±7.92 ms and 3.11±10.08 ms later than those determined by the force plate, respectively. The experimental results demonstrate that the new hardware and associated algorithm constitute an effective low-cost gait analysis system, which could thus be used for the assessment of mobility in routine clinical practice. [less ▲]

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See detailPoint actuel sur la signification des ratios agonistes / antagonistes au membre inférieur
Croisier, Jean-Louis ULg; Delvaux, François ULg; Kaux, Jean-François ULg et al

in Abstract book des XIVèmes Rencontres isocinétiques MEDIMEX / ROTHSCHILD (2012, November)

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See detailPerformances isocinétiques et risque lésionnel de l’épaule chez le joueur de handball de haut niveau
Forthomme, Bénédicte ULg; Schiettecatte, Delphine; GAULT, Clément ULg et al

in Abstract book des XIVèmes Rencontres isocinétiques MEDIMEX / ROTHSCHILD (2012, November)

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See detailInfluence of type of contraction upon tendinous tissue during training: animal model
Kaux, Jean-François ULg; Drion, Pierre ULg; Croisier, Jean-Louis ULg et al

in Meeusen, R; Duchateau, J; Roelands, B (Eds.) et al Book of Abstracts of the 17th annual Congress of the ECSS (2012, July)

Introduction: The treatment of choice for tendinopathies is eccentric reeducation. Although the clinical results appear favourable, the biomechanical changes to the tissue are not yet clear. Materiel and ... [more ▼]

Introduction: The treatment of choice for tendinopathies is eccentric reeducation. Although the clinical results appear favourable, the biomechanical changes to the tissue are not yet clear. Materiel and methods: This study compared the effects of two methods of training (eccentric (E) training and concentric (C) training) with untrained (U) rats. The animals underwent training over a period of five weeks. The tricipital, patellar and Achilles tendons were subsequently removed to perform a traction test to the point of tendon rupture, and a histological analysis was performed. Results: There was a significant improvement in the rupture force of the patellar and tricipital tendons between the U and E groups. The tricipital tendons in the control group presented a significantly smaller cross-section than the E- and C-trained groups. No significant difference was observed for the constraints between the three groups for all three tendons. However, a tendency towards improvement was observed between the trained and the U groups for the patellar tendon. Histological studies demonstrated the development of a greater number of blood vessels and a larger quantity of collagen in the eccentric group. Discussion and conclusion: The mechanical properties of tendons in rats improve after specific training, especially following eccentric training. [less ▲]

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See detailApplications cliniques du plasma riche en plaquettes (PRP) dans les lésions tendineuses : revue de la littérature
Smets, Fanny; Croisier, Jean-Louis ULg; Forthomme, Bénédicte ULg et al

in Science & Sports (2012), 27(3), 141-153

Tendinopathies are common and frequently resisting to actual conservative measures. The aim of this review was to gather the actual knowledge concerning the platelet-rich plasma (PRP) treatment in tendon ... [more ▼]

Tendinopathies are common and frequently resisting to actual conservative measures. The aim of this review was to gather the actual knowledge concerning the platelet-rich plasma (PRP) treatment in tendon lesion. The interest of this well-known technique, applied since almost 15 years in facial and dental surgery, is growing in the sports world because of its potential ability to treat refractory tendinopathies and to get back quickly a functional use. However, given the relative recent knowledge about PRP in sports medical, the studies could not yet reproduce the beneficial effects obtained in-vitro. Most studies about the subject indeed show an improvement in symptoms after PRP treatment but, because of the many biases introduced, such as the lack of population, the lack of control group or the many different kind of PRP used, the studies cannot be conferred a high level of evidence. Therefore, there is no evidence of formally advise the use of PRP in the treatment of tendinopathy. So the main research field in the close future will have to determine a standard for the manufacture of PRP and the protocols of the future studies in order to be able to compare them. [less ▲]

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See detailL'épaule du sportif : Evaluation fonctionnelle et réadaptation
Forthomme, Bénédicte ULg; Kaux, Jean-François ULg; Crielaard, Jean-Michel ULg et al

in Ortho-Rhumato (2012), 10(3), 46-50

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See detailSpécificités de la proprioception de l’épaule
Forthomme, Bénédicte ULg; Kaux, Jean-François ULg; Crielaard, Jean-Michel ULg et al

in Julia, M.; Hirt, D.; Perrey, S. (Eds.) et al La proprioception (2012)

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See detailIsokinetic intervention in microtraumatic shoulder instability: an update
Gremeaux, V.; Croisier, Jean-Louis ULg; Forthomme, Bénédicte ULg

in Journal of Sports Medicine & Physical Fitness (2012), 52

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See detail3D Analysis of Normal and Pathological Gait Based on Low-Cost Wireless Accelerometers
Boutaayamou, Mohamed ULg; Schwartz, Cédric ULg; Bruls, Olivier ULg et al

in URSI Benelux Forum 2012 “Antennas: multiple designs, multiple applications” (2012)

We describe the principle and use of a new low-cost, wireless, 3-axis accelerometer-based device that records acceleration signals and automatically analyses them to characterize normal and pathological ... [more ▼]

We describe the principle and use of a new low-cost, wireless, 3-axis accelerometer-based device that records acceleration signals and automatically analyses them to characterize normal and pathological gait. [less ▲]

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See detailImagerie motrice après fracture de l'extrémité distale du radius
BERNARD, Bénédicte ULg; LHOEST, C.; Foidart-Dessalle, Marguerite ULg et al

in Chirurgie de la Main (2011, December), 30(6), 477

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See detailLésions d’épaule chez le joueur de volleyball : approche isocinétique
Forthomme, Bénédicte ULg; Wieczorek, V.; Kaux, Jean-François ULg et al

in Abstract book des XIIIèmes Rencontres isocinétiques MEDIMEX/ROTHSCHILD (2011, November 25)

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See detailMuscles fléchisseurs et extenseurs de cheville en isocinétisme : méthodologie et contexte pathologique
Croisier, Jean-Louis ULg; Sutera, T.; Kaux, Jean-François ULg et al

in Abstract book des XIIIèmes Rencontres isocinétiques MEDIMEX/ROTHSCHILD (2011, November 25)

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See detailTravail excentrique et concentrés plaquettaires en pathologie tendineuse
Kaux, Jean-François ULg; Drion, Pierre ULg; Forthomme, Bénédicte ULg et al

in 13èmes Rencontres Medimex (2011, November 25)

Les tendinopathies apparaissent fréquentes au sein de la population active et sportive. Actuellement, la rééducation excentrique constitue une thérapeutique de choix dans leur traitement. Stanish en ... [more ▼]

Les tendinopathies apparaissent fréquentes au sein de la population active et sportive. Actuellement, la rééducation excentrique constitue une thérapeutique de choix dans leur traitement. Stanish en proposa dès les années 80 les principales règles. Bien que les résultats apparaissent favorables en clinique, les adaptations morphologiques et biochimiques des tissus n’ont pas encore été élucidées. Nous avons démontré que l’effort excentrique (réalisé par des rats en course en descente) participait au développement macroscopique du réseau de vaisseaux sanguins au niveau de l’épitendon et à une amélioration de la résistance à la traction longitudinale tendineuse. Ceci confirme donc que les propriétés mécaniques du tendon de rat sont améliorées après un entraînement excentrique. Le tendon, plus résistant, augmenterait sa quantité de fibres de collagène et probablement les interactions entre elles. La mécanotransduction serait le processus responsable du remaniement tissulaire lors de l’application de contraintes mécaniques. Cependant, en pratique clinique, une vingtaine de séances d’entraînement minimum semblent néanmoins nécessaires pour assurer l’efficacité du traitement. Depuis quelques années, en traumatologie sportive, les propriétés réparatrices des plaquettes sanguines sont mises à profit pour stimuler la cicatrisation tendineuse. Nous avons démontré, selon a modèle animal, que celles-ci permettaient d'accélérer le processus cicatriciel tendineux mais en amélioraient également la qualité. Cependant, ce processus ne peut se dérouler correctement que si le tendon est soumis à des contraintes mécaniques afin d'orienter les neo-fibres de collagène selon les lignes de forces. Nous sommes donc convaincus qu'en pratique clinique, une prise en charge rééducative excentrique sous-maximale est indispensable dans les suites d'une injection de concentré plaquettaire pour traiter une tendinopathie chronique. [less ▲]

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See detailLes lésions tendineuses de la coiffe des rotateurs
Forthomme, Bénédicte ULg; Kaux, Jean-François ULg; Crielaard, Jean-Michel ULg et al

in Abstract book du Premier Symposium d'Axxon, Qualité en Kinésithérapie (Actualité en Kinésithérapie) (2011, October)

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See detailReproducibility and repeatability of upper limb landmarks palpation for junior operators
Schwartz, Cédric ULg; Fedrigo, Tatiana ULg; Bruls, Olivier ULg et al

Poster (2011, July)

In human motion analysis, bone motions are usually expressed relatively to anatomical reference frames. The anatomical reference frames are constructed thanks to the localization of bony landmarks during ... [more ▼]

In human motion analysis, bone motions are usually expressed relatively to anatomical reference frames. The anatomical reference frames are constructed thanks to the localization of bony landmarks during a static phase prior to the acquisitions. These landmarks are identified by means of palpation. Accurate comparison between subjects and studies implies good reproducibility and repeatability of the palpation process. However, all investigators don’t have a long experience in palpation. In this paper, the reproducibility and repeatability of palpation for junior investigators were measured. Results show worse reproducibility and repeatability than what is usually expected. These errors have particularly an influence on the definition of the reference frames of the arm. This study therefore emphasizes on the need of a specific training of operators working in a motion lab. [less ▲]

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See detailImproving 3D measurements accuracy with camera information redundancy
Schwartz, Cédric ULg; Fringuellini, Anthony ULg; Bruls, Olivier ULg et al

Conference (2011, July)

The accuracy of the Codamotion system for 3D measurement depends mainly on the signal level of the sensors and the resolution of the system at the marker localization. When using several units to cover a ... [more ▼]

The accuracy of the Codamotion system for 3D measurement depends mainly on the signal level of the sensors and the resolution of the system at the marker localization. When using several units to cover a large field of view, the estimated position of the different units might differ. We propose a method taking both resolution and signal level in to account, instead of only the signal level as in the built-in weighting process. This new method offers improved accuracy. [less ▲]

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