veículo de difusão de informações em análise de marcha, reabilitação e biomecânica, captura de movimento para produções industriais
clinical gait analysis, rehabilitation and biomechanics, industrial "motion capture" (MoCap)
- IntelliGait: Using machine learning for pattern recognition and gait classification
This project takes advantage of a large-scale database of real-world clinical gait data captured during clinical praxis of the Rehabilitation Center Weißer Hof (AUVA). This dataset enables us to develop novel machine based learning methods for automated gait analysis and classification.
- SONIGait Project
The aim of the SONIGait Project is the design and manufacturing of a portable and low-cost pair of wireless-sensor shoe insoles, which are capable of capturing a person’s gait (walking) parameters and providing auditory information in real-time for altering movement. The ultimate goal of this project is to provide both clinicians and patients with an accurate and low-cost tool that will aid in the rehabilitation of abnormal gait patterns.
- Childrens' Knees
The aim of the Childrens’ Knees study is to analyse the changes in biomechanical gait characteristics of obese children and adolescents and furthermore to develop a specific exercise programme for this target group based on the discovered results. The exercise programme will be focused on neuromuscular and muscle strength training of lower extremity muscles and should reduce joint loads at hip and knee of obese children and adolescents
- Brelomate – Connecting the Older Generation
Elderly research participants wanted, 15. October 2016
"The team of Brelomate 2 is looking for senior citizens to participate in a field study on online-communication. In spring 2017 our Brelomate communication and gaming platform will be tested in 36 households in the St. Pölten area."
Details (in german)
Hugh Williamson Gait Analysis Laboratory - The Royal Children's Hospital - Melbourne
The Hugh Williamson Gait Analysis Laboratory is a world leader in the analysis of walking disorders in children. Using state of the art equipment our highly specialist staff are able to determine why children walk the way they do. Knowing this it is then possible to plan treatment individually for each child.
University of Queensland Centre for Clinical Research (UQCCR), Brisbane.
The Queensland Motion Analysis Centre (QMAC), based at RBWH, is working towards using motion analysis to identify the cause of medical problems in burns patients, premature babies and patients with neurological and movement disorders.
University of Waterloo - Department of Kinesiology
Kinesiology remembers professor David Winter:
"It is with sadness that the Department of Kinesiology announces the passing of David Winter, Distinguished Professor Emeritus and internationally renowned scholar in biomechanics and gait. Winter died Monday, February 6, 2012 at the age of 81."
Instituto Ortopedico Rizzoli di Bologna
Laboratory of Movement Analysis and Functional-Clinical Evaluation of Prosthesis:
The Movement Analysis Laboratory was established in 1989 as an independent research unit of the Rizzoli Orthopaedic Institute, with the purpose of performing quantitative instrumental analysis of human movement, in particular of the locomotor apparatus. The Laboratory, in close collaboration with the 1st Orthopaedic and Traumatologic Clinic and other Rizzoli clinical units, is specialized in gait analysis both in normal and pathological subjects, mostly in patients before and after surgery or following special rehabilitations programs.
Laboratorio di Analisi della Postura del Movimento - Politecnico di Milano
The "Luigi Divieti Posture and Movement Analysis Laboratory" operates within the Department of Bioengineering of the "Politecnico di Milano". Instruments and methodologies are mainly oriented to the study of human posture and movement, and they can be easily employed to measure and evaluate whichever situation of living movement and artificial systems.
Graphics and Media Laboratory - Lomonosov Moscow State University, CMC Department
"Automatic point cloud pre-alignement using orientation histograms
Terrestrial laser scanners allow to obtain accurate 3d model of the object as a point cloud. Real objects should be scanned with different instrument positions and then scan data is registered into the single coordinate system. In practice the process of registration is performed using manual or semi-automated registration techniques. First fully automatic methods were introduced about fifteen years ago. Many of the methods based on well-known iterative closest point algorithm (ICP) permit to obtain the exact solution of a problem. Nevertheless, the problem is difficult to solve due to necessity of information regarding the coarse relative orientation parameters of point clouds. We develope the algorithm based on usage of orientation histogram to solve a problem without any information concerning scan positions. Experimental studies of the algorithm have demonstrated its efficiency at any values of point clouds relative orientation."
University of Central Lancashire (UCLAN) - Professor in Biomechanics - School of Health Sciences
"Professor Richards' research includes much work on clinical application of biomechanics, the development of new assessment tools for chronic disease, conservative and surgical management of orthopaedic and neurological conditions, and development of evidence based approaches for improving clinical management and rehabilitation. The focus of Professor Richards' work is to encourage inter-professional research and to develop direct parallels with research to the ‘real world’ of allied health work."
"The Oxford Foot Model is a method for measuring motion within the foot.
Gait analysis uses markers attached to the body to allow motion of the joints to be measured during walking. This is achieved by modeling the body as a series of different 'segments' that are connected by joints.
Historically, the whole foot has been modeled as one, rigid segment. This meant that motion at the joints within the foot was not represented.
In addition, this over-simplification of the foot led to inaccuracies in the measurements.
A more accurate and detailed method for measuring the motion of the foot and ankle was therefore required.
The Oxford Foot Model began to be developed at the Oxford Gait Laboratory, in collaboration with Oxford University, in the late 1990s. Two separate D.Phil. projects were dedicated to this project. The end result was a multi-segment foot model, which allowed detailed analysis of the mechanics of the foot during walking.
Since 2005, we have used the Oxford Foot Model clinically and routinely on patients with cerebral palsy, club foot, toe walkers and other patients with a foot-related question.
University of Salford - A Greater Manchester University
Richard moved to takeup the world's first chair in Clinical Gait Analysis in February 2010 after spending the last nine years at the Royal Children's Hospital in Melbourne, Australia. his first degree was in physics from Cambridge and his PhD in biomechanics from Dundee. He spent 7 years managing the Gait Analysis Service at the Musgrave Park Hospital in Belfast before moving to a similar role in Mebourne. Between 2005 and 2009 he was the Director of the Centre for Clinical Research Excellence in Clinical Gait Analysis and Gait Rehabilitation (the Gait CCRE) at the Murdoch Children's Research Insitute (MCRI) in Melbourne. He still holds honorary appointments with the MCRI, the University of Melbourne and La Trobe University.
Fabien Leboeuf, Julie Reay, Richard Baker (University of Salford - UK)
Morgan Sangeux (University of Melbourne, Murdoch Childrens Research Institute,
The Royal Children's Hospital (RCH) - AU)
Derek Potter (Commercial Partner: Vicon - UK)
"The Conventional Gait Model is the most widely used biomechanical model for clinical gait analysis. It was first developed in the 1980s and although, it has many strengths, it has several well-known weaknesses.
The overall aim of this project is to develop and validate a new version, CGM 2, which maintains the current model's strengths but addresses its weaknesses. The new version will allow robust, efficient and standardised data capture by people whose primary interest is in using the results of the gait analysis.
Although the project aims to make the new model as compatible as possible with the old it cannot be identical. It is therefore important that future users know exactly how the new version differs from the old. This will be ensured by developing the model in a series of iterations each addressing a specific weakness and each fully validated to understand the behaviour of the new model in comparison to the old one.
We want the new model to be as open and transparent as possible. All code will be developed in python and made available through GitHub. The project is part-funded by Vicon and we will focus first on implementations to support use of the new models with Vicon's suite of clinical gait analysis software. We are open to developing similar relationships with other manufacurers."
Chairman, Department of Physical Medicine and Rehabilitation; John Otto Haas Chair of Physical Medicine and Rehabilitation; Director, Sheerr Gait and Motion Analysis Laboratory; Clinical Director, Regional Amputee Center; Chief, Prosthetic and Orthotic Clinic; Co-director, Neuro-orthopedic Program
MossRehab, part of Einstein Healthcare Network
James H. Clark Professor of Bioengineering, Mechanical Engineering, and Orthopaedic Surgery Director, National Center for Simulation in Rehabilitation Research Director, Mobilize Center
Neuromuscular Biomechanics Lab (NBL) - Stanford Engineering
Stanford School of Medicine
Kit Vaughan delivers his adieus - 24 December 2009
"Now gearing up for the world of private enterprise, Kit Vaughan, UCT's Hyman Goldberg Professor of Biomedical Engineering since 1996, recently delivered his valedictory lecture at the Faculty of Health Sciences.
Vaughan, aged 56, is now looking forward to the next vignette in his professional career that will follow his retirement from UCT: that of business man. "I have realised that I am at heart an entrepreneur, and that I'm still young enough and have sufficient energy to pursue another career," he said.
In partnership with UCT and with funding from the Industrial Development Corporation, Vaughan has launched a spin-off company that will market low-dose x-ray technology for the early detection of breast cancer. There is clear evidence from other countries that screening programmes can "dramatically" curb the disease"s mortality rates, Vaughan said."
"I am more convinced than ever that we have the technology with the potential to save many lives, both here in South Africa and elsewhere in the world."
"Com a internet praticamente disponível em todos os locais, é consenso que o acesso à informação e também à formação profissional tornou-se bastante facilitado. Neste cenário, as pessoas não apenas podem ter o acesso às notícias quase em tempo real mas também a conteúdos importantes que podem enriquecer e aprimorar seus conhecimentos, melhorando sua formação e sua capacidade de realização. Deste modo, a informação é um potencial agente na contínua capacitação do indivíduo como transformador de conhecimento em riqueza e resultados sociais, integrando-o cada vez mais à sociedade.
Porém, em paralelo a essa quantidade infindável de informações, constatamos também que dispomos de cada vez menos tempo para pesquisar e nos informar sobre coisas relevantes, que agreguem valor à formação profissional. Assim, apesar de existir uma quantidade muito grande de conhecimento na rede, este conhecimento está difuso, muitas vezes não organizado e cuja pesquisa com resultados efetivos demoraria mais tempo do que aquele que as pessoas dispõem, desmotivando o seu alcance.
Uma das áreas onde esta limitação é mais grave é aquela que envolve tecnologia e saúde: o acesso rápido ao conhecimento atualizado e ao networking profissional poderia contribuir para melhores resultados, com tratamentos mais efetivos e melhoria da qualidade de vida das pessoas.
Assim, surgiu a T4H Rede de Conhecimento, com a finalidade de desenvolver, manter e aprimorar o Portal Tech4Health: uma proposta de concentração e disseminação de conhecimento na área de tecnologia e saúde, com acesso livre, para que todas as pessoas que de algum modo estão envolvidas com tecnologia e saúde, sejam da academia, da indústria, de Instituições de saúde ou mesmo que queiram se formar nesta área, possam estar inseridas em uma comunidade profissional que compartilha saberes e experiências."
Análise cinemática da movimentação dos membros superiores e inferiores,
tronco, e cabeça durante a marcha de hemiparéticos
Abstract: The aim of this study was to analyze integrally the movement of upper and lower limbs, trunk and head using the following kinematics variables: joint angles, spatiotemporal variables, trajectory of total body center of mass and partial contributions of the segments for the trajectory of total body center of mass. In order to identify and analyze the gait pattern alterations developed by hemiparetic subjects affected by stroke, were analyzed 14 hemiparetics subjects, males, aged between 40 and 60 years old, who presented at least 3 years post-injury, and no walking aids used. To represent the normal gait were selected 7 able-bodies subjects, males, aged between 40 and 60 years old, without gait deviations. The data was obtained by videogrammetry through the DVideo system. The body segments orientation model used on this study consisted in 71 surface markers, whereas 15 articulated body segments. The data processing was done by Matlab software. The statistical analysis was based on the following comparisons: 1) right and left sides of the control group subjects and between the affected and unaffected sides of the hemiparetic group; 2)Comparisons between hemiparetic group and control group; 3) Continuous angle variables comparisons between the affected hemiparetic side versus control group and unaffected hemiparetic side versus control group; 4) Comparisons of the trajectory of total body center of mass and the percent of partial contributions of body segments between control group versus hemiparetic group (P<0.05). The results showed that the affected upper limb movement was significantly altered, with reduced flexion/extension range of motion in the glenohumeral and elbow joints, and it was associated with the elbow joint flexion and rotation tendency throughout the gait cycle. Were also detected significant changes on the three lower limbs movement planes and spatiotemporal variables that agree with the literature findings. The integrated analysis showed changes in stroke gait pattern could be related to the affected upper limb movement disturbances. This is another aggravating factor on the stroke gait pattern. The analysis of the trajectory of total body center of mass showed that the lateral and vertical directions curves of hemiparetic subjects were approximately sinusoidal, with two peaks of different amplitudes, associated with a lower anterior-posterior displacement of the total body center of mass during gait of hemiparetic. The percentual contribution of body segments for the trajectory of total body center of mass showed that the trunk contributed more to the lateral center of mass, and in vertical direction the leg and foot on the affected side contributed more to lower vertical displacement of center of mass. In the lateral direction the lower limbs compensed the upper limbs reduction. reduction. Changes in the direction of progression come from the combination of the disturbances observed in the other two directions.
Comparação entre protocolos de marcadores anatômicos e técnicos
para análise cinemática na marcha e na corrida
Abstract: The purpose of this study was to compare two protocols for kinematical analysis of sprinters according to velocities, body segments and joint angles during walking and running. The first protocol uses retroreflective markers mounted on fixtures attached to the body segment and the second uses retroreflective markers directly located on the skin surface. Six male athletes were studied during treadmill running at 5 and 20 Km/h and recorded with eight 120 Hz video cameras. A three-dimensional model constituted by fifteen segments represented the sprinters: head, thorax, pelvis, the right and left feet, shanks, thighs, scapulas, arms and forearms. The calibration of the cameras, the synchronization of the registrations and the 3D reconstruction of the coordinates of the markers were done in the Dvideo software. All data were analyzed using Matlab 7.0. The results show that the variability of the length of the segments and of the distances between the markers and the maximum difference maximum between the angles obtained by each protocol were higher with the increase of the velocities, showing that the errors in the analysis of the movement during the running were larger than these ones during the gait. There was no effect of the velocities in the correlation between the angles obtained by each protocol. The variability of the distances between the markers in the lower limb were higher than this one in the upper limbs and the variability of the length of the shank was higher than this one in the other segments. The results also showed a higher correlation was found between the flexion/extension angles (0,99) obtained by each protocol and for each joint, followed by the abduction/adduction angles (0,78) and the angles of internal/external rotation (0,65). The lower values found in the maximum angular difference were between the flexion/extension angles (6,3° ± 3,4°) obtained by each protocol and for each articulation, followed by the abduction/adduction angles (13,2° ± 7,9°) and the angles of internal/external rotation (17,2° ± 8,4°). No differences were found in the variability of the length of the segments and also in the analysis of the angular kinematics, however the adduction/abduction and internal/external rotation angles should be regarded with much more caution.
Análise de Marcha: protocolo experimental a partir de variáveis cinemáticas e antropométricas
Abstract: The human gait is a complex movement and its analysis requires a model of the human body based on a system of articulated rigid bodies with several degrees of freedom. Because of the difficulty in obtaining the anthropometric and kinematics variables needed for analysis, it is common in the biomechanics field to use a representative model only involving the inferior limbs of the body and the pelvis. However, the human body is an articulated system, and any alterated movement in one of its parts will affect the global result of the gait. The analysis of the whole human body during such a movement cycle would be of great importance for the understanding of eventual disturbances of the movement during the gait. The aim of this paper is to propose an experimental protocol for gait analysis with orientation of head, trunk, pelvis, superior and inferior members from kinematics and anthropometric variables. This protocol was implemented for the Dvideow system. The orientation and representation model of the corporal segments proposed in this work presents six degrees of freedom for each one of the segments, an important factor for a complete gait analysis, because all the body segments can be analyzed simultaneously, preserving its six degrees of freedom during gait. The quality of the results obtained was evaluated by accuracy tests, kinematics and anthropometric variables, and comparing the joint angles obtained according to protocols proposed in the literature. The agreement in the segmentation of the proposed model for kinematics analysis and the anthropometric model allowed the acquisition of anthropometrics measures concomitantly, reducing the time for the collection of reliable data and easing the imposed conditions for direct measurement. The integration these two types of analysis, kinematics and anthropometric, including the segments like head and superior members, facilitates the interpretation of the movement disturbances. In conclusion, this study developed a protocol to analyze the human gait that integrates the acquisition of kinematics and anthropometric parameters of the whole body, results presented are compatible to findings in the literature, and represents a movement analysis system of low cost. What makes feasible the use of this methodology is a more accurate analysis of normal pathological movements during gait.
Análise da marcha de indivíduos com Doença de Parkinson
submetidos à estimulação cerebral profunda de alta frequência do núcleo subtalâmico
Abstract: Levodopa has been shown to be efficient in treating Parkinson's disease (PD) in its initial phase. However, as the disease progresses, motor complications, such as abnormalities of the gait, are common. High frequency deep brain stimulation (DBS) of the subthalamic nucleus (STN) is one of the surgical treatment methods recommended for advanced cases. The aim of the present study was to compare the gait parameters of PD patients under the influence of dopaminergic medication and/or high frequency DBS using the Gait Deviation Index (GDI) and the Gait Profile Score (GPS). Sixteen PD patients were submitted to high frequency DBS of the STN. The gait assessments were applied using the UPDRS (Unified Parkinson's Disease Rating Scale) part III scale in three conditions: without medication and with stimulation; with medication and stimulation; with medication and without stimulation. The gait
assessment was conducted using three-dimensional kinematics. The kinematic data was then used to calculate the GDI and GPS. The data were analyzed
using the variance for repeated measures test (ANOVA), with the level of statistical significance set at P < 0.05. Statistically significant differences (P < 0.05) were found for the variables UPDRS, GDI, GPS and GVS (Gait Variable Score) (Hip Flx / Ext, Knee Flx / Ext) between the treatment with medication and without stimulation and the other two treatment conditions. In the comparison between treatment without medication and with stimulation and the other two treatment methods, or isolated medication compared to the other two treatment methods together, a high magnitude of effect was observed (Cohen’s ¯d = 0.60 - 1.93) for the variables UPDRS, GPS and GVS (Hip and Knee), whereas a medium magnitude was found for GDI (Cohen’s ¯d = 0.45) bilaterally. The results demonstrated that PD patients recorded greater scores in the UPDRS, GDI and GPS-MAP when the two treatments were applied together.
Modelagem matemática, simulação e controle artificial da postura em seres humanos
Abstract: Neural prostheses and motor control studies may find in computational simulation studies helpful aids. This work, focusing on human postural dynamics and control, looked for developing a series of models that should include: rigid body mechanics, muscular contraction and neural excitation dynamics, and also an associated geometric musculoskeletal modeI. A methodology for controller design was established, using the LQR approach, and the pseudoinverse matrix for distribution of control torques among redundant musculotendon actuators, employing also an inverse model of muscular contraction dynamics. Results shows some effects on simulations for initial conditions, with LQR weight matrix variations. Muscular coordination pattem is dicussed
Modelagem biomecânica e controle ótimo da postura humana através de algoritmos baseados na teoria das aproximações consistentes
Abstract: This work presents improvements on a biomechanical model of the human posture developed by the author (Menegaldo, 1997; Menegaldo e Weber, 1998). Several submodelswere analyzed, dealing with multi-body dynamics, muscle mechanics, neuromuscular activation dynamics and lower limb musculotendon geometry. An optimal control methodology developed by Schwartz (1996), based on Polak's Consistent Approximations Theory (Polak, 1996), has been used to find open-loop muscular activations patterns for postural tasks. Optimal cost functions were chosen and tested to solve the optimal control problem, at the same time that the actuator redundancy problem is solved in a physiologically feasible way. The resulting
methodology is to be applied, in the future, for numerical simulation of the posture behavior in normal or impaired people who are candidate to orthopedic surgeries procedures.