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Aging is associated with an increased risk of falling. This lead to a decrease of autonomy and deleterious consequences in case of fall. Rehabilitation exercises must be performed in order to maintain optimal balance. Since a few year... more
Aging is associated with an increased risk of falling. This lead to a decrease of autonomy and deleterious consequences in case of fall. Rehabilitation exercises must be performed in order to maintain optimal balance. Since a few year video games are used into conventional rehabilitation to motivate patients to regularly do those exercises. Since the motion performed by the patients can be recorded during the games it offers new possibilities to perform evaluation and follow-up of the patients. The aim of this study was to determine if the data collected during specially developed balance rehabilitation exercises using the Microsoft Kinect™ sensor and the Wii Balance Board™ are correlated with the functional and clinical status of elderly patients.
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Introduction: Les articulation costo-vertebrales sont des complexes anatomiques impliques mecaniquement, a la fois dans la fonction respiratoire et dans la stabilite du rachis thoracique [1, 2]. Ces dernieres decennies le complexe... more
Introduction: Les articulation costo-vertebrales sont des complexes anatomiques impliques mecaniquement, a la fois dans la fonction respiratoire et dans la stabilite du rachis thoracique [1, 2]. Ces dernieres decennies le complexe articulaire costo-vertebral a ete l'objet de plusieurs etudes dans le but d'ameliorer la comprehension du comportement mecanique du thorax. Les etudes experimentales en rapport avec les articulations costo-vertebrales rapportent des donnees in vitro lors de tests de compressions [3, 4] ou des analyses de variations de volume globaux [5].Materiel et methodes: Dans cette presentation, des images tomodensitometriques in vivo ont ete obtenu chez un sujet asymptomatique. Le sujet a maintenu une pause respiratoire a trois volumes pulmonaires differents (depuis la capacite pulmonaire totale (CPT) a la capacite residuelle fonctionnelle (CRF)).La methode de fusion de donnees incluant les modeles 3D ainsi que l'analyse cinematique a ete utilise afin d...
Research Interests: Anatomie and Biomécanique
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Introduction. Physically based prediction of joint and muscle force distribution using multibody mechanics and numerical methods of mixed dynamics [1,2] requests accurate adjustment of the model parameters defined in reproducible... more
Introduction. Physically based prediction of joint and muscle force distribution using multibody mechanics and numerical methods of mixed dynamics [1,2] requests accurate adjustment of the model parameters defined in reproducible coordinate system(CS) using strict definition of anatomical landmarks (ALs) [3]. This paper focuses on development of customizable dynamical model of human passive motions, based on accurate 3D bones and soft tissue reconstruction, medical imaging data (CT, MRI) and stereophotogrammetry by digital cameras during subject dissection [4]. Methods and Results Based on past protocols [5], customizable dynamical models were imported as bone surfaces and soft tissue attachment data of one subject's right leg in MSC ADAMS software. Some results of 3D bones and soft tissues morphology reconstruction are presented in figure 1. Currently the model includes (fig. 2) hip joint, femoro-tibial joint, femoro-patellar joint and ankle joint. Joints are simulated by full ...
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This paper presents a protocol for 3D functional evaluation of fingers. A specific methodology has been developed to solve problems related to material limits, such as optoelectronic camera configuration in a gait laboratory environment,... more
This paper presents a protocol for 3D functional evaluation of fingers. A specific methodology has been developed to solve problems related to material limits, such as optoelectronic camera configuration in a gait laboratory environment, clusters shape and dimensions for small segments, precise initial processing for quality of data collection , postprocessing for better visualization of clinical parameters. The protocol provides data related to subject specific kinematic of the hand (ranges of motion (ROMs), helical axes specifications, motion patterns...). The protocol was applied in a group of twenty healthy volunteers. Results show good agreement with the literature. This protocol will be used in the future in patients with various finger disorders to allow rehabilitation quantification, deficit measurement, recovery objectification, etc...
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Several clinical applications rely on accurate guiding information when drilling along the femoral neck (e.g., pin insertion in case of neck fracture). Currently, applications rely on real-time X-ray imaging, which results in irradiation... more
Several clinical applications rely on accurate guiding information when drilling along the femoral neck (e.g., pin insertion in case of neck fracture). Currently, applications rely on real-time X-ray imaging, which results in irradiation issues for the surgeon conducting the operation. The goal of this paper was to develop an X-ray-free method that would allow for a pathway to be drilled between the lateral aspect of the femoral diaphysis (the so-called piercing point), the femoral neck and the head centres. The method is based on on-the-fly computational predictions relying on a biomechanical database that includes morphological data related to the femoral neck and head and various palpable anatomical landmarks located on the pelvis and the femoral bone. From the spatial location of the anatomical landmarks, scalable multiple regressions allow for the prediction of the most optimal drilling pathway. The method has been entirely validated using in vitro experiments that reproduce su...
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ABSTRACT
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Computer-assisted learning (CAL) is growing quickly within academic programs. Although the anatomical commercial packages that are available for this learning have attractive advantages, they also have drawbacks: they are frequently not... more
Computer-assisted learning (CAL) is growing quickly within academic programs. Although the anatomical commercial packages that are available for this learning have attractive advantages, they also have drawbacks: they are frequently not in the local language of the students, they do not perfectly answer the needs of the local academic program, and their cost is frequently more than students can afford. This study describes a relatively inexpensive method to create CAL tutorials, whose content can be fully customized to local academic needs in terms of both program and language. The study describes its use in creating multimedia learning modules (MLMs) about Osteology and joint kinematics. The pedagogical content in these modules was collected from objective experiments to give students the opportunity to access new scientific knowledge during their education. It can be replaced, as desired, by almost any content due to the flexibility of the production method. Each MLM consists of t...
Research Interests: Physiology, Computer Science, Education, Educational Technology, Multimedia, and 15 moreFunctional Anatomy, Osteology, Multimedia Learning, Medicine, Biological Sciences, Anatomy, Computer Assisted Learning, Kinematics, Computer Assisted Instruction, Human Anatomy, MLM, Anatomy Education, Medical Physiology, Cal, and Medical and Health Sciences
Three-dimensional (3D) visualization is becoming increasingly frequent in both qualitative and quantitative biomechanical studies of anatomical structures involving multiple data sources (e.g. morphological data and kinematics data). For... more
Three-dimensional (3D) visualization is becoming increasingly frequent in both qualitative and quantitative biomechanical studies of anatomical structures involving multiple data sources (e.g. morphological data and kinematics data). For many years, this kind of experiment was limited to the use of bi-dimensional images due to a lack of accurate 3D data. However, recent progress in medical imaging and computer graphics has forged new perspectives. Indeed, new techniques allow the development of an interactive interface for the simulation of human motions combining data from both medical imaging (i.e., morphology) and biomechanical studies (i.e., kinematics). Fields of application include medical education, biomechanical research and clinical research. This paper presents an experimental protocol for the development of anatomically realistic joint simulation within a pedagogical context. Results are shown for the lower limb. Extension to other joints is straightforward. This work is part of the Virtual Animation of the Kinematics of the Human project (VAKHUM) (http://www.ulb.ac.be/project/vakhum).
Research Interests: Engineering, Computer Science, Computer Graphics, Animation, Medical Education, and 15 moreData Visualization, Humans, Clinical research, Computer Simulation, Human Motion, Kinematics, Computer User Interface Design, Computer Graphic, Data representation, Lower limb, Joints, Biomécanique, Lower Extremity, D, and Medical and Health Sciences
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3D reconstruction of soft tissue (muscles, ligaments) morphology, including extraction of muscle and tendon fibre topology and attachments, is a time-consuming task. It requests 3D reconstruction of dissected soft tissues as alternative... more
3D reconstruction of soft tissue (muscles, ligaments) morphology, including extraction of muscle and tendon fibre topology and attachments, is a time-consuming task. It requests 3D reconstruction of dissected soft tissues as alternative to high resolution MRI that shows some limitations. This paper proposes a method using stereophotogrammetry on the basis of semiprofessional digital cameras allowing soft tissue data collection and maintaining high quality results.
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INTRODUCTION Calibration of anatomical landmarks (ALs) [1] is a key procedure for the determination of anatomical features related to the bones of a particular subject. Such ALs can then be used for the definition of local joint reference... more
INTRODUCTION Calibration of anatomical landmarks (ALs) [1] is a key procedure for the determination of anatomical features related to the bones of a particular subject. Such ALs can then be used for the definition of local joint reference frames or registration with other data for advanced visualization or modeling [2]. In all cases the accuracy of the AL location will depend on the system used for such digitizing. The accuracy is directly proportional to the quality of the final registration and the repeatability of the measurements (a key element in a clinical setting, e.g., for patient follow-up) [2]. Standards procedures for AL location include setting of reflective markers on the subject’s skin at relevant spots, leading to relatively high errors because of skin artifacts. A more accurate method is the use of calibrated wands in order to better locate the ALs. Unfortunately, the latter method is time consuming and the protocol requires, 1 first to palpate the relevant AL with the finger pulp; -2 then to remove the finger from the AL; 3 to set the extremity of the wand on the AL; 4 to eventually digitize the AL location. The transition between steps 2 and 3 is prone to introduce errors since the palpating sensitive finger leaves the point of interest to be replaced by a non-sensitive instrument. The aim of this undergoing study is to develop a protocol able to calibrate a customized palpation system made of the palpating finger of the individual performing the palpation (i.e., the “palpator”) and a technical frame attached on this finger. Results will be presented during the conference.
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Standard registration techniques of bone morphology to motion analysis data often lead to unsatisfactory motion simulation because of discrepancies during the location of anatomical landmarks in the datasets. This paper describes an... more
Standard registration techniques of bone morphology to motion analysis data often lead to unsatisfactory motion simulation because of discrepancies during the location of anatomical landmarks in the datasets. This paper describes an iterative registration method of a three-dimensional (3D) skeletal model with both 6 degrees-of-freedom joint kinematics and standard motion analysis data. The method is demonstrated in this paper on the lower limb. The method includes two steps. A primary registration allowed synchronization of in vitro kinematics of the knee and ankle joints using flexion/extension angles from in vivo gait analysis. Results from primary registration were then improved by a so-called advanced registration, which integrated external constraints obtained from experimental gait pre-knowledge. One cadaver specimen was analyzed to obtain both joint kinematics of knee and ankle joints using 3D electrogoniometry, and 3D bone morphology from medical imaging data. These data were registered with motion analysis data from a volunteer during the execution of locomotor tasks. Computer graphics output was implemented to visualize the results for a motion of sitting on a chair. Final registration results allowed the observation of both in vivo motion data and joint kinematics from the synchronized specimen data. The method improved interpretation of gait analysis data, thanks to the combination of realistic 3D bone models and joint mechanism. This method should be of interest both for research in gait analysis and medical education. Validation of the overall method was performed using RMS of the differences between bone poses estimated after registration and original data from motion analysis.
Research Interests: Engineering, Mechanical Engineering, Computer Science, Computer Vision, Biomedical Engineering, and 15 moreMedical Imaging, Biomechanics, Medical Education, Gait, Humans, Computer Simulation, Gait Analysis, Kinematics, Male, Computer Graphic, Medical Image, Lower limb, Ankle, Degree of Freedom, and Biomechanical Phenomena
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I. INTRODUCTION Despite of being relatively easy type of motion for modeling unsupported motion is nevertheless very important field of study in terms of practical application in biomechanics. The samples of such motion include movements... more
I. INTRODUCTION Despite of being relatively easy type of motion for modeling unsupported motion is nevertheless very important field of study in terms of practical application in biomechanics. The samples of such motion include movements of astronauts in a state of ...
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ABSTRACT Recently, an interesting study was brought forward, concerning the distinguishing of our body from not-body devices 1 . In using the computer, the computer mouse may be regarded as such a device that is experienced as part of our... more
ABSTRACT Recently, an interesting study was brought forward, concerning the distinguishing of our body from not-body devices 1 . In using the computer, the computer mouse may be regarded as such a device that is experienced as part of our body sometimes, especially in relation to hand and fingers. In handling the computer mouse however, hand and finger will always try to follow their own characteristic kinematics. It is not surprising therefore, that various upper extremity dysfunctions emerged, together with the increasing popularity of the PC. This coincidence may become even more relevant, also in view of the still growing computer use by e.g. the elderly 2 . In the next survey, some frequent hand and finger dysfunctions related to mouse scrolling will be dealt with, mainly based on our specific knowledge of finger anatomy and kinematics.
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ABSTRACT Computer simulation of normal goal-oriented motion of human lower arm and hand may be also successfully applied in studying movement disorders, known as focal dystonias. Upper limb focal dystonia includes disturbed muscle tension... more
ABSTRACT Computer simulation of normal goal-oriented motion of human lower arm and hand may be also successfully applied in studying movement disorders, known as focal dystonias. Upper limb focal dystonia includes disturbed muscle tension balances, leading to painful, impaired and often aberrant motions. In their attempts to trace the backgrounds of this disorder, several authors have stressed the importance of the brain primary somatosensory cortex, and its role in brain-mapping. This turns out to be especially relevant during learning processes of new motor skills like practising by musicians. The present overview however will mainly analyse musculoskeletal mechanisms of arm and hand movements, with regard to their kinematics in repetitive motions. We will concentrate on pronation and supination movements of the lower arm during repeated shifting of the hand, as in handling a computer mouse, and focus on the maintaining of stable finger position during PC mouse scrolling. Physical therapy (PT) already proved itself useful in treating these focal dystonias, also known as repetitive strain injury (RSI). As an adjuvant to PT, we wish to propose local vibration therapies. Encouraging results of such a treatment, emanating from a recent pilot-study, are presented in conclusion.
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Introduction: This report considers the results of the authors’ research on the goal-oriented computer synthesis of human motions in support and non-support phases. The main attention is paid to the synthesis of the pushing phases. In... more
Introduction: This report considers the results of the authors’ research on the goal-oriented computer synthesis of human motions in support and non-support phases. The main attention is paid to the synthesis of the pushing phases. In particular, an analysis is made of the results of a sequential optimization of running long jumps and acrobatic jumps. The computer modeling of complex coordination motions is based on the development of an adequate anthropomorphic model. Methods and Results: Most effective in the developed modeling system proved to be the employment of differentiated non-stationary holonomic and nonholonomic constraints equations in order to model goal-oriented motions [1]. For descriptions of additional non-stationary items in constraints equations we used parametrically controlled smooth approximation functions which allowed us to synthesize the desired motion trajectories, ground reaction force and kinetic moment increment. Due to the non-stationary nature of const...
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The role of problem of computer synthesis of a human motion for a traditional problem of control generalized and muscular forces determination is discussed. It is emphasized significance of computer model choice for adequate analysis... more
The role of problem of computer synthesis of a human motion for a traditional problem of control generalized and muscular forces determination is discussed. It is emphasized significance of computer model choice for adequate analysis kinematic and dynamic experimental data. On the basis of an imitation computer model influence of model's parameters values is demonstrated. With help of non-stationary constraints we can simulate human motions that satisfy to the most significant parameters of the concerned class of motion. Some results of simulation are discussed. We arrive at a conclusion that for correct interpretation of an experiment mixed problem of bodies system dynamics must be solved.
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ABSTRACT INTRODUCTIONModelling of the whole human SMA motion and of its parts gives general information about the motion control, for example, such as distribution of inter-element moments at basic joints. The real motion control is... more
ABSTRACT INTRODUCTIONModelling of the whole human SMA motion and of its parts gives general information about the motion control, for example, such as distribution of inter-element moments at basic joints. The real motion control is carried out due to muscles contraction and restrictions on mobility in joints, stipulated by constraints. The detailed study of such structure of control should be based on the most exact possible information about geometry of elements, joints and, especially, paths and points of attaching of tendons, through which pulling is carried out. Such a model for a human finger will be considered in this report.METHODS Each tendon is presented as a continuous stretched linear inextensible filament, partially mobile with respect to finger phalanxes contour. Part of the points of this contour are fixed on the phalanges, ensuring the motion of the model of the tendon as a whole. Between fixed points, located on adjacent phalanxes, the relative motion of the contour is determined by the fixed and mobile boundaries.RESULTS AND DISCUSSIONThus, for the basic tendons of extensor assembly and flexors, it is necessary to use a computer model, based on data derived from tendons, position of fixed and mobile points of an outline related to the phalanx. Synthesised motion of the finger determines relative motion of the tendons. Calculation of changing of tendons length allows ,after smoothing, to estimate a velocity of tendons motion. The graphic illustration in the form of kinematics schemes shows four sequential positions of a finger with tendons represented in fig. 1. Two flexors (FD and FS) and the extensor assembly, consisting from of two basic tendons (MB and LI) and six intermediate ones, actually give complete representation of the mechanism of motion control of the finger. Values of tendons motion velocities are depicted there too. Distal phalanx rotation is selected as an independent variable on the graphs.CONCLUSION The basic purpose of modelling consists in construction of a model closest in anatomical and functional aspects to real finger motion in the saggital plane. The task of motion synthesis makes it possible to define distribution of inter-element moments, energy expenditure and power, and, finally, the pulling forces in tendons. This is done in the supposition, that the principle of minimum of expenditures of biomechanical energy is in force.
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Victor Sholukha, Olivier Snoeck, Stéphane Sobczak,, Véronique Feipel,, Jean-Louis Lufimpadio, Fedor Moiseev, Marcel Rooze, Fulvia Taddei and Serge Van Sint Jan Laboratory of Anatomy, Biomechanics and Organogenesis (LABO), Université Libre... more
Victor Sholukha, Olivier Snoeck, Stéphane Sobczak,, Véronique Feipel,, Jean-Louis Lufimpadio, Fedor Moiseev, Marcel Rooze, Fulvia Taddei and Serge Van Sint Jan Laboratory of Anatomy, Biomechanics and Organogenesis (LABO), Université Libre de Bruxelles (ULB), Belgium. Department of Applied Mathematics, SPbSPU, St Petersburg, Russia. 3 Laboratory of Medical Technology, Istituti Ortopedici Rizzoli, Italy. Email: vcholouk@ulb.ac.be, web: www.ulb.ac.be/~anatemb
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Le thorax est un complexe osseux implique dans la fonction respiratoire ainsi que dans la stabilite du rachis. Si beaucoup d’etudes se sont penchees sur l’etude des deplacements volumiques, peu d’importance a ete accordee a l’etude des... more
Le thorax est un complexe osseux implique dans la fonction respiratoire ainsi que dans la stabilite du rachis. Si beaucoup d’etudes se sont penchees sur l’etude des deplacements volumiques, peu d’importance a ete accordee a l’etude des mecanismes osteoarticulaires impliques dans la fonction respiratoire. Le but du travail entrepris etait donc de creer un modele tridimensionnel du thorax humain lors du mouvement respiratoire a partir de donnees tomodensitometriques obtenues in vivo a trois volumes pulmonaires chez des sujets sains et des patients atteints de mucoviscidose. Les objectifs etant de permettre la visualisation, la qualification ainsi que la quantification de parametres geometriques et cinematiques du thorax global, mais aussi au niveau costovertebral segmentaire. Le modele developpe permet de comprendre les mecanismes osteoarticulaires impliques dans la fonction respiratoire et de mesurer l’impact d’une situation pathologique sur les differents parametres etudies. L’interet complementaire de la modelisation 3D est de proposer des simulations valides ainsi qu’un outil pedagogique et didactique de haute qualite.
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Рассмотрены особенности постановки и решения задачи синтеза движений антропоморфных механизмов. Обоснована необходимость использования системы дифференциально-алгебраических уравнений при синтезе движения с желаемыми качеством. Показано,... more
Рассмотрены особенности постановки и решения задачи синтеза движений антропоморфных механизмов. Обоснована необходимость использования системы дифференциально-алгебраических уравнений при синтезе движения с желаемыми качеством. Показано, что основанный на решении смешанной задачи динамики системы твердых тел, стесненных параметризованными связями, подход к синтезу движений позволяет формулировать задачи оптимизации целенаправленных движений в пространстве наблюдений. Кроме того, использование в качестве уравнений связей балансовых соотношений для кинематических и/или динамических характеристик движения и параметрической настройки математической модели позволяет обеспечить совпадение расчетных и измеренных зависимостей. Решаемая в такой постановке задача синтеза движений антропоморфного механизма фактически становится базисным элементом более общей задачи идентификации математической модели. В рамках обсуждаемого подхода проведен компьютерный синтез акробатического движения как в опо...
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This paper proposes a methodological pipeline to acquire data required to build a musculoskeletal model of the long fingers, and to obtain from this model information on joint motion behaviour, tendon excursion and moment arms. This paper... more
This paper proposes a methodological pipeline to acquire data required to build a musculoskeletal model of the long fingers, and to obtain from this model information on joint motion behaviour, tendon excursion and moment arms. This paper is a feasibility study. The protocol has been applied on a non pathological hand issue from a fresh-frozen specimen. Several CT-scan image sets have been acquired to collect the hand posture in various discrete positions. Data processing has been performed in a customized software interface called « lhpFusionBox » to create a specimen-specific model and to reconstruct a motion based on the collected discrete positions with the help of virtual palpation. Tendon information have been added based on anatomical knowledge obtained from dissections. Helical axis orientation has been used to orientate the anatomical frames used from motion representation. Biomechanical information such as motion behaviour and tendon moment arms have been then computed. Th...
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En 1886, la mise au jour de deux squelettes neandertaliens dans les sediments de la terrasse de la grotte de Spy, en Belgique, fut une decouverte majeure. Une etude pluridisciplinaire des fossiles a permis la decouverte de nouveaux... more
En 1886, la mise au jour de deux squelettes neandertaliens dans les sediments de la terrasse de la grotte de Spy, en Belgique, fut une decouverte majeure. Une etude pluridisciplinaire des fossiles a permis la decouverte de nouveaux ossements neandertaliens qui appartiennent au squelette nomme « Spy II ». Bien que partiel, le squelette de Spy II est un de plus complets trouves a ce jour ; il a donc servi dans cette etude comme de base a la reconstitution d’un squelette neandertalien virtuel. Les elements osseux provenaient des fossiles Kebara 2 pour le bassin (en provenance d’Israel) et Neandertal 1 pour le femur (Allemagne). Ces fossiles complementaires presentaient des dimensions differentes de celles de Spy II. Afin de mettre ces ossements a l’echelle de Spy II, le logiciel lhpFusionBox, developpe au LABO, a ete ameliore afin de permettre des remises a l’echelle par utilisation d’os differents (en general, une telle remise a l’echelle se fait en utilisant des os homologues). L’utilisation de ces outils a permis l’obtention d’un modele de membres inferieurs aussi proche que possible des dimensions et proportions du specimen Spy II. Le modele de membres inferieurs ainsi acquis a ensuite ete augmente d’une estimation des lignes d’actions de muscles ischio-jambiers. Enfin, ce dernier modele a ete fusionne avec un jeu de donnees cinematiques collectees sur un volontaire. Ceci a permis d’estimer le bras de levier des muscles reconstitues et de determiner si les surfaces articulaires du modele de Neandertalien est compatible avec la cinematique moderne. Les resultats semblent demontrer que les articulations des membres inferieurs des Neandertaliens etait conciliable avec les mouvements de l’Homo Sapiens. Par contre, les estimations quantifiees des bras de levier musculaires du Neandertalien etaient plus eleves que ceux l’homme moderne. Ceci presente evidement un avantage mecanique conferant un plus grand moment musculaire. Plus recemment, le squelette a ete entierement reconstitue. Les modeles 3D virtuels des os ont ensuite ete imprimes en 3D en taille reelle. Ces os ont servis de base a une reconstitution artistique hyperrealiste de l’Homme de Spy, visible a l’Espace de l’ Homme de Spy a Onoz (province de Namur, Belgique).
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Research Interests: Medicine and Biomécanique
Research Interests: Biomechanics, Modeling, Medicine, Simulation, In Vitro, and 15 moreHumans, Computer Simulation, Kinematics, Cervical Vertebrae, Medical Physiology, Bending, Reproducibility of Results, Computerized tomography, In Vitro Studies, Rotation, Cervical Spine, Kinematic Analysis, Range of Motion, Biomechanical Phenomena, and Model simulation
Research Interests: Engineering, Algorithms, Biomedical Engineering, Medicine, Linear models, and 15 moreOptimization, Validation, Humans, Computer Simulation, Potentiometry, Calibration, Physical sciences, Three Dimensional, Joints, Range of Motion, Equipment Design, D, Biomechanical Phenomena, Parametric Model, and Medical and Health Sciences
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Realistic and anatomically correct modelling of the spatial behaviour of the human musculoskeletal (MS) system requests combining of data collected from different sources. This study presents a protocol to create 3D MS models based on... more
Realistic and anatomically correct modelling of the spatial behaviour of the human musculoskeletal (MS) system requests combining of data collected from different sources. This study presents a protocol to create 3D MS models based on accurate morphological and kinematics data. Registration procedures for bones morphology and kinematics were available from past work [S. Van Sint Jan, 2005]. The main subject of the study was soft tissue registration and implementation of the results in the ‘LhpBuilder’ software, developed during EC funded project ‘LHDL’ [S. Van Sint Jan 2007 and http://www.biomedtown.org/biomed_town/LHDL].
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Research Interests: Computer Science, Artificial Intelligence, Computer Vision, Biomedical Engineering, Medicine, and 13 moreHumans, Computer Simulation, Kinematics, Male, Three Dimensional Imaging, Middle Aged, Reproducibility, Reproducibility of Results, Ankle Joint, Sensitivity and Specificity, X ray Computed Tomography, Ankle, and Electrical And Electronic Engineering
Accurate spatial location of joint center (JC) is a key issue in motion analysis since JC locations are used to define standardized anatomical frames, in which results are represented. Accurate and reproducible JC location is important... more
Accurate spatial location of joint center (JC) is a key issue in motion analysis since JC locations are used to define standardized anatomical frames, in which results are represented. Accurate and reproducible JC location is important for data comparison and data exchange. This paper presents a method for JC locations based on the multiple regression algorithms without preliminary assumption on the behavior of the joint-of-interest. Regression equations were obtained from manually palpable ALs on each bone-of-interest. Results are presented for all joint surfaces found on the clavicle, scapula and humeral bone. Mean accuracy errors on the JC locations obtained on dry bones were 5.2+/-2.5 mm for the humeral head, 2.5+/-1.1 mm for the humeral trochlea, 2.3+/-0.9 mm for the humeral capitulum, 8.2+/-3.9 mm for the scapula glenoid cavity, 7.2+/-3.2 mm for the scapular aspect of the acromio-clavicular joint, 3.5+/-1.8mm for the clavicular aspect of the sternoclavicular joint and 3.2+/-1....