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Statistical gait analysis in patients after total hip arthroplasty

Carneiro, Susana Moreira
Fonte: Instituto Politécnico de Bragança, Escola Superior de Tecnologia e Gestão Publicador: Instituto Politécnico de Bragança, Escola Superior de Tecnologia e Gestão
Tipo: Dissertação de Mestrado
ENG
Relevância na Pesquisa
66.26%
Patient’s functional recovery after Total Hip Arthroplasty (THA) is often slow. Besides, patients tend to adjust gait patterns to avoid the pain, a condition referred to as antalgic gait. The aim of this work is to highlight changes in gait and muscle activation patterns of patients after total hip arthroplasty, by means of a statistical gait analysis. The gait analysis was performed on 20 patients with unilateral hip prosthesis (3, 6 and 12 months post-operatively) and 20 controls, at self-selected and fast speed. The analysis was performed using the system Step 32 (DemItalia, Italy). Various statistical analyses were done to compare the outcomes of the two groups. Subjects were examined bilaterally by means of basographic sensors (foot switches), goniometric sensors (in the knee and hip), and surface electromyography of five leg muscles. This study demonstrated that, for patients, the number of atypical strides is higher and the heel contact phase is extended in time, in both sides. Besides, on the operated leg, despite a significant increase in the hip dynamic range of motion, patients do not reach normal range of motion (ROM) values even one year after the intervention. Furthermore, the electromyographic results show that the number of simpler activations tends to increases and the number of complex activations decreases over the time for THA patients...

The relation of triceps surae surgical lengthening and crouch gait in patients with cerebral palsy

MORAIS FILHO, Mauro Cesar de; KAWAMURA, Catia Miyuki; KANAJI, Paulo Rogerio Cardozo; JULIANO, Yara
Fonte: LIPPINCOTT WILLIAMS & WILKINS Publicador: LIPPINCOTT WILLIAMS & WILKINS
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
56.14%
To investigate the effect of earlier triceps surae (TS) surgical lengthening at knee kinematics in the stance phase in patients with cerebral palsy (CP). One thousand and thirty-nine participants from an eligible total of 1750 children with CP were referred to gait analysis laboratory from January 2000 to April 2007. Inclusion criteria were the diagnosis of diparetic spastic CP levels I to III (GMFCS) and complete kinematics documentation. Patients with an asymmetrical knee pattern at kinematics and with different types of TS management among sides were excluded. The patients were divided into two groups according to the mean minimum knee flexion (MMKF) in stance phase: group A (n = 253) MMKF >= 30 degrees and group B (n = 786) MMKF less than 30 degrees. For each group, the occurrence of following procedures for TS in the past: (i) earlier surgery, (ii) gastrocnemius lengthening (zone I), (iii) gastrocnemius and soleus lengthening (zone II), and (iv) calcaneous tendon lengthening (zone III), was investigated. A chi(2) test was applied to check if the number of procedures performed was different between groups. The level of significance was defined as P value of less than 0.05. The number of patients with no earlier surgeries at TS was higher in group B (51.8%) than in group A (39.1%)...

Are the recommendations from three-dimensional gait analysis associated with better postoperative outcomes in patients with cerebral palsy?

MORAIS FILHO, Mauro Cesar de; YOSHIDA, Rafael; CARVALHO, Wander da Silva; STEIN, Helena Elisa; NOVO, Neil Ferreira
Fonte: ELSEVIER IRELAND LTD Publicador: ELSEVIER IRELAND LTD
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
66.32%
This study was performed to check if recommendations based on three-dimensional gait analysis (3DGA) are associated with better postoperative outcomes in patients with cerebral palsy (CP). Thirty-eight patients who underwent orthopedic surgery and assessment at the Gait Analysis Laboratory were evaluated retrospectively. The patients were divided in four groups according to the agreement between the recommendations from gait analysis and the procedures actually carried out. Fifteen patients with diplegic spastic cerebral palsy and indication for orthopedic surgery to improve walking - and whose surgical intervention was postponed - were also included in the study as a control group. Fourteen gait parameters recorded before and after treatment, were included in the statistical analysis. No gait improvement was noted in the control group or inh patients on whom no procedures recommended by the gait exam were performed (agreement of 0%). In the other groups, agreements averaged 46.71%, 72.2%, and 100%, respectively. Improvement of gait parameters after treatment was observed in these groups, with more significant values directly related to increased agreement percentage. Therefore, in this study the patients whose treatment matched the recommendations from three-dimensional gait analysis showed a more significant improvement in walking. (c) 2008 Elsevier B.V. All rights reserved.

Comparação entre dois protocolos de reabilitação após reconstrução do ligamento cruzado anterior através de análise biomecânica; Comparison between two rehabilitation protocols after anterior Cruciate ligament reconstruction using biomechanics analysis

Lima, Claudia Silveira
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 29/06/2006 PT
Relevância na Pesquisa
46.33%
Exercícios em cadeia cinética aberta e fechada tem sido propostos para a reabilitação no pós operatório de reconstrução do ligamento cruzado anterior. Não há consenso na literatura sobre qual o tipo de exercício é mais apropriado e ao mesmo tempo seguro, não pondo em risco o procedimento cirúrgico. O propósito deste estudo foi verificar os efeitos da utilização de protocolos de reabilitação em cadeia cinética aberta e fechada de indivíduos em pós operatório de reconstrução do ligamento cruzado anterior, através de respostas comportamentais verificadas por indicadores biomecânicos. A amostra experimental foi constituída de trinta indivíduos, divididos em três grupos amostrais independentes: (CON) dez indivíduos normais que não sofreram nenhum tipo de intervenção; (CCF) dez pacientes submetidos ao programa de reabilitação em cadeia cinética fechada e (CCA) dez pacientes submetidos ao programa de reabilitação em cadeia cinética aberta. Os testes para avaliar os parâmetros biomecânicos selecionados foram realizados em duas etapas: avaliação clínica (deslocamento tibial anterior e escore de Lysholm) e avaliação da marcha (análise dinâmica, cinemática e eletromiográfica). O tratamento foi realizados três vezes por semana...

Efeito do uso da ankle-foot orthosis na biomecânica da marcha de pacientes com Distrofia Muscular de Duchenne; Effect of use of ankle-foot orthosis on the gait biomechanics of patients with Duchenne muscular dystrophy

Souza, Mariana Angélica de
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 05/12/2014 PT
Relevância na Pesquisa
46.31%
O objetivo deste estudo foi avaliar o efeito do uso noturno ou diurno da ankle-foot orthosis (AFO) na biomecânica da marcha de pacientes com DMD. Foram avaliados 20 pacientes deambuladores, do Ambulatório de Miopatias Infantis do CER do HCFMRP-USP, com diagnóstico de distrofia muscular de Duchenne (DMD), com idades entre 4 e 12 anos. Foi realizada a avaliação inicial (Av1) em todos os pacientes e, 7 pacientes foram reavaliados após 6 meses (Av2). Na Av1, os pacientes foram agrupados conforme o uso da órtese: grupo sem órtese (SO; n=7), grupo órtese noturna (ON; n=7), grupo órtese diurna (OD; n=6). Na Av1 e na Av2 foram obtidos dados de massa corporal, altura, composição corporal pela bioimpedância elétrica, escore funcional pela escala medida da função motora, amplitude passiva de movimento articular, força muscular isométrica pelo dinamômetro Handheld e avaliação biomecânica da marcha, na velocidade habitual do paciente. Os pacientes que faziam uso da órtese diurna foram avaliados sem e com órtese, sendo denominados grupos ODs e ODc, respectivamente. Os dados foram analisados de três formas: duas transversais e uma longitudinal. Nas análises transversais, foram realizados dois procedimentos: (i) comparando dados dos grupos SO x ON x ODs; (ii) comparando dados dos grupos SO x ON x ODc. Nestas...

Comparação entre dois protocolos de reabilitação após reconstrução do ligamento cruzado anterior através de análise biomecânica; Comparison between two rehabilitation protocols after anterior cruciate ligament reconstruction using biomechanics analysis

Lima, Claudia Silveira
Fonte: Universidade Federal do Rio Grande do Sul Publicador: Universidade Federal do Rio Grande do Sul
Tipo: Tese de Doutorado Formato: application/pdf
POR
Relevância na Pesquisa
46.33%
Exercícios em cadeia cinética aberta e fechada tem sido propostos para a reabilitação no pós operatório de reconstrução do ligamento cruzado anterior. Não há consenso na literatura sobre qual o tipo de exercício é mais apropriado e ao mesmo tempo seguro, não pondo em risco o procedimento cirúrgico. O propósito deste estudo foi verificar os efeitos da utilização de protocolos de reabilitação em cadeia cinética aberta e fechada de indivíduos em pós operatório de reconstrução do ligamento cruzado anterior, através de respostas comportamentais verificadas por indicadores biomecânicos. A amostra experimental foi constituída de trinta indivíduos, divididos em três grupos amostrais independentes: (CON) dez indivíduos normais que não sofreram nenhum tipo de intervenção; (CCF) dez pacientes submetidos ao programa de reabilitação em cadeia cinética fechada e (CCA) dez pacientes submetidos ao programa de reabilitação em cadeia cinética aberta. Os testes para avaliar os parâmetros biomecânicos selecionados foram realizados em duas etapas: avaliação clínica (deslocamento tibial anterior e escore de Lysholm) e avaliação da marcha (análise dinâmica, cinemática e eletromiográfica). O tratamento foi realizados três vezes por semana...

Análise biomecânica da marcha de indivíduos com osteoartrite do compartimento medial do joelho; Biomechanical gait analysis in subjects with knee osteoarthritis of the medial compartiment

Hésojy Gley Pereira Vital da Silva
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 09/02/2011 PT
Relevância na Pesquisa
56.24%
O objetivo deste trabalho é demonstrar a presença e a magnitude de determinadas variáveis biomecânicas na marcha de indivíduos com osteoartrite (OA) do compartimento medial de joelho. Em seguida, tentar relacioná-las com o carregamento do joelho, representado pelos picos precoce e tardio de momento adutor, na busca de fenômenos adaptativos ou de agravamento da patologia. Para isto, 16 indivíduos saudáveis e 21 indivíduos diagnosticados com OA do compartimento medial do joelho sintomáticos foram submetidos à análise da marcha e em seguida comparadas variáveis nos três planos espaciais. Avaliando os parâmetros espaço-temporais, observou-se que o grupo com OA apresentou redução de todos os valores (comprimento da passada, cadência, velocidade e tempo de ciclo) em relação ao grupo controle, principalmente representados pela redução da velocidade (0,8±0,1 vs. 1,1±0,1m/s). Exceção feita ao percentual da fase apoio que não apresentou modificação significativa. Na avaliação cinética, tanto o pico precoce do momento adutor (2,6±1,2 vs. 0,3±1,4 Nm/kg) quanto o pico tardio do momento adutor se apresentaram elevados nos indivíduos com OA (1,8±0,7 vs. 0,9±0,2 Nm/kg). Observação semelhante ocorreu no plano frontal...

Kinematic gait analyses in healthy Golden Retrievers

Silva,Gabriela C.A.; Cardoso,Mariana Trés; Gaiad,Thais P.; Brolio,Marina P.; Oliveira,Vanessa C.; Assis Neto,Antonio; Martins,Daniele S.; Ambrósio,Carlos E.
Fonte: Colégio Brasileiro de Patologia Animal - CBPA; Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) Publicador: Colégio Brasileiro de Patologia Animal - CBPA; Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2014 EN
Relevância na Pesquisa
56.28%
Kinematic analysis relates to the relative movement between rigid bodies and finds application in gait analysis and other body movements, interpretation of their data when there is change, determines the choice of treatment to be instituted. The objective of this study was to standardize the march of Dog Golden Retriever Healthy to assist in the diagnosis and treatment of musculoskeletal disorders. We used a kinematic analysis system to analyse the gait of seven dogs Golden Retriever, female, aged between 2 and 4 years, weighing 21.5 to 28 kg, clinically normal. Flexion and extension were described for shoulder, elbow, carpal, hip, femorotibialis and tarsal joints. The gait was characterized lateral and had accepted hypothesis of normality for all variables, except for the stance of hip and elbow, considering a confidence level of 95%, significance level α = 0.05. Variations have been attributed to displacement of the stripes during movement and the duplicated number of reviews. The kinematic analysis proved to be a consistent method of evaluation of the movement during canine gait and the data can be used in the diagnosis and evaluation of canine gait in comparison to other studies and treatment of dogs with musculoskeletal disorders.

Three-dimensional kinematic analysis of upper and lower limb motion during gait of post-stroke patients

Carmo,A.A.; Kleiner,A.F.R.; Costa,P.H. Lobo da; Barros,R.M.L.
Fonte: Associação Brasileira de Divulgação Científica Publicador: Associação Brasileira de Divulgação Científica
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2012 EN
Relevância na Pesquisa
56.27%
The aim of this study was to analyze the alterations of arm and leg movements of patients during stroke gait. Joint angles of upper and lower limbs and spatiotemporal variables were evaluated in two groups: hemiparetic group (HG, 14 hemiparetic men, 53 ± 10 years) and control group (CG, 7 able-bodied men, 50 ± 4 years). The statistical analysis was based on the following comparisons (P ≤ 0.05): 1) right versus left sides of CG; 2) affected (AF) versus unaffected (UF) sides of HG; 3) CG versus both the affected and unaffected sides of HG, and 4) an intracycle comparison of the kinematic continuous angular variables between HG and CG. This study showed that the affected upper limb motion in stroke gait was characterized by a decreased range of motion of the glenohumeral (HG: 6.3 ± 4.5, CG: 20.1 ± 8.2) and elbow joints (AF: 8.4 ± 4.4, UF: 15.6 ± 7.6) on the sagittal plane and elbow joint flexion throughout the cycle (AF: 68.2 ± 0.4, CG: 46.8 ± 2.7). The glenohumeral joint presented a higher abduction angle (AF: 14.2 ± 1.6, CG: 11.5 ± 4.0) and a lower external rotation throughout the cycle (AF: 4.6 ± 1.2, CG: 22.0 ± 3.0). The lower limbs showed typical alterations of the stroke gait patterns. Thus, the changes in upper and lower limb motion of stroke gait were identified. The description of upper limb motion in stroke gait is new and complements gait analysis.

Is it possible to identify the gender and age group of adults from gait analysis with hip-knee cyclograms?

Abreu,Ródney Silva; Naves,Eduardo Lázaro Martins; Caparelli,Thiago Bruno; Mariano,Daniel Teodoro Gonçalves; Dionísio,Valdeci Carlos
Fonte: SBEB - Sociedade Brasileira de Engenharia Biomédica Publicador: SBEB - Sociedade Brasileira de Engenharia Biomédica
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/09/2014 EN
Relevância na Pesquisa
56.04%
INTRODUCTION: Cyclograms are gait analysis tools that characterize the geometric aspect of the pattern of locomotion. Cyclograms are angle-angle diagrams that are very useful for representing cyclic patterns such as walking. This study is based on the hypothesis that parameters extracted from hip-knee cyclograms of individuals walking on a treadmill with 0° and 5° slopes can be used to determine the age group and sex of the volunteers. METHODS: In total, 40 physically active healthy adult volunteers, 20 young people (10 of each gender) and 20 elderly (10 of each gender), were divided into 4 groups, and the average value of area (A), perimeter (P) and the ratio P/√A of cyclogram were calculated, as well as the speed and cadence. RESULTS: The young male (YM) speeds were higher than the elderly male (EM) speeds (p=0.00), and the young female (YF) speeds were higher than the elderly female (EF) speeds (p=0.00). No difference in speed was found between YM and YF (p=0.59) or between EM and EF (p=0.95). The parameters extracted directly from the cyclogram allowed us to distinguish the studied groups according to age group (p<0.05), especially with the treadmill inclined at 5°, but it was not enough to determine gender (p>0.51). CONCLUSION: The hypothesis was partially confirmed because parameters extracted from the hip-knee cyclograms could differentiate volunteers by age group but not gender.

Gait Analysis Using Wearable Sensors

Tao, Weijun; Liu, Tao; Zheng, Rencheng; Feng, Hutian
Fonte: Molecular Diversity Preservation International (MDPI) Publicador: Molecular Diversity Preservation International (MDPI)
Tipo: Artigo de Revista Científica
Publicado em 16/02/2012 EN
Relevância na Pesquisa
46.33%
Gait analysis using wearable sensors is an inexpensive, convenient, and efficient manner of providing useful information for multiple health-related applications. As a clinical tool applied in the rehabilitation and diagnosis of medical conditions and sport activities, gait analysis using wearable sensors shows great prospects. The current paper reviews available wearable sensors and ambulatory gait analysis methods based on the various wearable sensors. After an introduction of the gait phases, the principles and features of wearable sensors used in gait analysis are provided. The gait analysis methods based on wearable sensors is divided into gait kinematics, gait kinetics, and electromyography. Studies on the current methods are reviewed, and applications in sports, rehabilitation, and clinical diagnosis are summarized separately. With the development of sensor technology and the analysis method, gait analysis using wearable sensors is expected to play an increasingly important role in clinical applications.

Variations in Kinematics during Clinical Gait Analysis in Stroke Patients

Boudarham, Julien; Roche, Nicolas; Pradon, Didier; Bonnyaud, Céline; Bensmail, Djamel; Zory, Raphael
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: Artigo de Revista Científica
Publicado em 17/06/2013 EN
Relevância na Pesquisa
46.36%
In addition to changes in spatio-temporal and kinematic parameters, patients with stroke exhibit fear of falling as well as fatigability during gait. These changes could compromise interpretation of data from gait analysis. The aim of this study was to determine if the gait of hemiplegic patients changes significantly over successive gait trials. Forty two stroke patients and twenty healthy subjects performed 9 gait trials during a gait analysis session. The mean and variability of spatio-temporal and kinematic joint parameters were analyzed during 3 groups of consecutive gait trials (1–3, 4–6 and 7–9). Principal component analysis was used to reduce the number of variables from the joint kinematic waveforms and to identify the parts of the gait cycle which changed during the gait analysis session. The results showed that i) spontaneous gait velocity and the other spatio-temporal parameters significantly increased, and ii) gait variability decreased, over the last 6 gait trials compared to the first 3, for hemiplegic patients but not healthy subjects. Principal component analysis revealed changes in the sagittal waveforms of the hip, knee and ankle for hemiplegic patients after the first 3 gait trials. These results suggest that at the beginning of the gait analysis session...

Evaluation of a novel accelerometer for kinetic gait analysis in dogs

Clark, K.; Caraguel, C.; Leahey, L.; Béraud, R.
Fonte: Canadian Veterinary Medical Association Publicador: Canadian Veterinary Medical Association
Tipo: Artigo de Revista Científica
Publicado em //2014 EN
Relevância na Pesquisa
56.2%
The objective of this study was to evaluate a novel accelerometer-based sensor system, the Walkabout Portable Gait Monitor (WPGM), for use in kinetic gait analysis of dogs. The accelerometer was compared to the common reference standard of force platform analysis. Fifteen client-owned, orthopedically sound dogs of various breeds underwent simultaneous force platform and accelerometer gait trials to measure peak vertical forces (PVFs). The agreement between PVF for the accelerometer and force platform was measured using concordance correlation coefficient (CCC) and was found, overall, to be moderate [CCC = 0.51; 95% confidence interval (CI): 0.46 to 0.56]. The agreement between PVF for the accelerometer and force platform for the forelimbs was positive and substantial (CCC = 0.79; 95% CI: 0.74 to 0.84) and for the hind limbs was positive and low (CCC = 0.34; 95% CI: 0.29 to 0.38). As measured by the accelerometer, PVF was systematically higher than as measured by the force platform (forelimbs 55.3 N, hind limbs 144.3 N). It was also found that, when positioned over the lumbar spine, the WPGM cannot measure PVF of the individual forelimbs and hind limbs, which limits its use as a clinical tool to measure kinetic variables in dogs. = L’objectif de la présente étude était d’évaluer un nouveau système d’accéléromètre...

Untersuchungen zur Analyse biomechanischer und neuromuskulärer Adaptationsprozesse der menschlichen Gang- und Laufbewegung; Biomechanical and neuromuscular adaptations of the human gait cycle in walking and running

Hirschmüller, Anja Nicole
Fonte: Universidade de Tubinga Publicador: Universidade de Tubinga
Tipo: Dissertação
DE_DE
Relevância na Pesquisa
56.27%
Einleitung: Veränderungen der Biomechanik der unteren Extremität wurden in den vergangenen Jahren ursächlich mit einer Vielzahl laufspezifischer Beschwerden in Zusammenhang gebracht. Es konnte jedoch gezeigt werden, dass ein mechanischer Ansatz allein nur unzureichende Erklärungsmöglichkeiten bietet, so dass der Versuch einer biologisch-funktionellen Betrachtung der komplexen Bewegung zunehmend in den Vordergrund des wissenschaftlichen Interesses trat. Ziel der vorliegenden Arbeit war, anhand neuromuskulärer und biomechanischer Bewegungsanalysen Adaptationsprozesse der menschlichen Gang- und Laufbewegung auf variierende externe Stimuli zu untersuchen sowie die Validität des Barfussgehens als Referenzbewegung zu überprüfen. Methode: Bei 15 beschwerdefreien Probanden wurden bei 5 und 12km/h die elektromyographische Aktivität (bipolares Oberflächen-EMG, 10 Muskeln der unteren Extremität) und die plantare Druckverteilung (Druckmessplatte und In-Schuh-Druckmesssystem) auf der Ebene, bei 5% Gefälle und 5% Steigung, auf dem Laufband und auf der Ebene sowie barfuss und beim Tragen unterschiedlicher Schuhe registriert. In einem zweiten Untersuchungsabschnitt wurde die Gangbewegung barfuss vor und nach einer fünftägigen Adaptationsphase an das Barfussgehen untersucht. Als Messgrößen dienten der Beginn...

Finite element modelling of an energy–storing prosthetic foot during the stance phase of transtibial amputee gait

BONNET, Xavier; PILLET, Helene; FODE, Pascale; LAVASTE, Francois; SKALLI, Wafa
Fonte: SAGE Publicador: SAGE
EN
Relevância na Pesquisa
56.3%
Energy-storing prosthetic feet are designed to store energy during mid-stance motion and to recover it during latestance motion. Gait analysis is the most commonly used method to characterize prosthetic foot behaviour during walking. In using this method, however, the foot is generally modelled as a rigid body. Therefore, it does not take into account the ability of the foot to deform. However, the way this deformation occurs is a key parameter of various foot properties under gait conditions. The purpose of this study is to combine finite element modelling and gait analysis in order to calculate the strain, stress and energy stored in the foot along the stance phase for self-selected and fast walking speeds. A finite element model, validated using mechanical testing, is used with boundary conditions collected experimentally from the gait analysis of a single transtibial amputee. The stress, strain and energy stored in the foot are assessed throughout the stance phase for two walking speed conditions: a self-selected walking speed (SSWS), and a fast walking speed (FWS). The first maximum in the strain energy occurs during heel loading and reaches 3 J for SSWS and 7 J for FWS at the end of the first double support phase. The second maximum appears at the end of the single support phase...

Influence of physical capacities of males with transtibial amputation on gait adjustments on sloped surfaces

LANGLOIS, Karine; VILLA, Coralie; BONNET, Xavier; LAVASTE, Francois; FODE, Pascale; MARTINET, Noel; PILLET, Helene
Fonte: JRRD Publicador: JRRD
EN
Relevância na Pesquisa
56.04%
The aim of the study was to investigate how kinematic and kinetic adjustments between level and slope locomotion of persons with transtibial amputation are related to their individual muscular and functional capacities. A quantified gait analysis was conducted on flat and slope surfaces for seven patients with transtibial amputation and a control group of eight subjects to obtain biomechanical parameters. In addition, maximal isometric muscular strength (knee and hip extensors) and functional scores were measured. The results of this study showed that most of the persons with transtibial amputation could adapt to ramp ascent either by increasing ankle, knee, and hip flexion angles of the residual limb and/or by recruiting their hip extensors to guarantee enough hip extension power during early stance. Besides, 6-minute walk test score was shown to be a good predictor of adaptation capacities to slope ascent. In ramp descent, the increase of knee flexion moment was correlated with knee extensor strength and residual-limb length. However, no correlation was observed with functional parameters. Results show that the walking strategy adopted by persons with transtibial amputation to negotiate ramp locomotion mainly depends on their muscular capacities. Therefore...

Doença de Parkinson : análise da marcha e uso de pistas visuais; Parkinson's disease : gait analysis and visual cues

Roberta de Melo Roiz
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 05/09/2011 PT
Relevância na Pesquisa
46.34%
A Doença de Parkinson idiopática (DPI) é uma afecção neurodegenerativa. Parâmetros da DPI geram mudanças do padrão da marcha. Algumas escalas de avaliação vêm sendo utilizadas para caracterizar as alterações da marcha na DPI, porém há poucas publicações que correlacionem a análise cinemática e dados têmporo-espaciais com escalas clínicas, ou que avaliem o efeito de dois tipos de pistas visuais espaciais (transversas e paralelas) em comparação a ausência de pistas na marcha. O objetivo do Artigo 1 foi comparar os dados têmporo-espaciais e cinemáticos da marcha entre pacientes com DPI e idosos saudáveis (IS) e avaliar a relação entre estas variáveis com os instrumentos clínicos. Doze pacientes com DPI e quinze IS foram recrutados e avaliados por instrumentos clínicos e pela análise de marcha. Os resultados em relação à velocidade da marcha, do comprimento do passo (CP) e das variáveis cinemáticas do quadril (contato inicial, na máxima extensão no apoio e na máxima flexão no balanço) demonstraram diferenças significativas entre os grupos em estudo. Dessa forma, podemos afirmar que os instrumentos clínicos utilizados não são adequados para uma avaliação descritiva e objetiva da marcha dos indivíduos com DPI...

Gait analysis comparing Parkinson's disease with healthy elderly subjects

Roiz,Roberta de Melo; Cacho,Enio Walker Azevedo; Pazinatto,Manoela Macedo; Reis,Julia Guimarães; Cliquet Jr,Alberto; Barasnevicius-Quagliato,Elizabeth M.A.
Fonte: Academia Brasileira de Neurologia - ABNEURO Publicador: Academia Brasileira de Neurologia - ABNEURO
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/02/2010 EN
Relevância na Pesquisa
56.14%
There is a lack of studies comparing the kinematics data of idiopathic Parkinson's disease (IPD) patients with healthy elder (HE) subjects, and when there is such research, it is not correlated to clinical measures. OBJECTIVE: To compare the spatio-temporal and kinematic parameters of Parkinsonian gait with the HE subjects group and measure the relation between these parameters and clinical instruments. METHOD: Twelve patients with IPD and fifteen HE subjects were recruited and evaluated for clinical instruments and gait analysis. RESULTS: There were statistically significant differences between HE group and the IPD group, in stride velocity, in stride length (SL), and in the hip joint kinematic data: on initial contact, on maximum extension during terminal contact and on maximum flexion during mid-swing. Regarding the clinical instruments there were significant correlated with in stride velocity and SL. CONCLUSION: Clinical instruments used did not present proper psychometric parameters to measure the IPD patient's gait, while the 3D system characterized it better.

Ergonomics, anthropometrics, and kinetic evaluation of gait: A case study

Lima, Rosa; Fontes, Liliana Magalhães Campos; Arezes, P.; Carvalho, Miguel
Fonte: Elsevier Publicador: Elsevier
Tipo: Artigo de Revista Científica
Publicado em //2015 ENG
Relevância na Pesquisa
56.26%
This study aimed to develop appropriate changes in a pair of shoes in order to improve the gait of an individual selected for this case study. This analysis took into account ergonomic aspects, namely those relating to the individual’s anthropometrics. Gait analysis was done with the adapted footwear both before and after intervention.A conventional X-ray was performed, which revealed a 29-mm left lower limb shortening and possible foot adduction. The anthropometric assessment confirmed a 27-mm asymmetry between the left knee and foot.Corrective changes were implemented in the left boot, with a 20-mm increase in the plantar aspect and approximately 30-mm in the calcaneus area.The pressure-mapping system WalkinSense was used for the kinetic gait analysis. Results showed some improvement in plantar pressure distribution after corrective changes in footwear. Peak pressure in the left foot decreased from 2.8kg/cm2 to 1.6kg/cm2. The second peak also showed a marked decrease. The right foot presented with a reduction in peak plantar pressure from 2.7kg/cm2 to 2.3kg/cm2.After identifying asymmetries, the associated pathologies and modifyingthe footwear, a kinetic analysis of gait before and after altering the footwear was undertaken...

Automatic learning of 3D pose variability in walking performances for gait analysis

Rius, Ignasi; Gonzàlez, Jordi; Mozerov, Mikhail; Roca, F. Xavier
Fonte: Serials Publications Publicador: Serials Publications
Tipo: Artículo Formato: 498860 bytes; application/pdf
ENG
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11 pages, 5 figures, 3 tables.; This paper proposes an action specific model which automatically learns the variability of 3D human postures observed in a set of training sequences. First, a Dynamic Programing synchronization algorithm is presented in order to establish a mapping between postures from different walking cycles, so the whole training set can be synchronized to a common time pattern. Then, the model is trained using the public CMU motion capture dataset for the walking action, and a mean walking performance is automatically learnt. Additionally statistics about the observed variability of the postures and motion direction are also computed at each time step. As a result, in this work we have extended a similar action model successfully used for tracking, by providing facilities for gait analysis and gait recognition applications.; This work has been supported by EC grants IST-027110 for the HERMES project and IST-045547 for the VIDI-Video project, and by Spanish MEC under projects TIN2006-14606 and DPI-2004-5414. Jordi Gonzàlez also acknowledges the support of a Juan de la Cierva Postdoctoral fellowship from the Spanish MEC. The database used in this project was obtained from mocap.cs.cmu.edu which was created with funding from NSF EIA-0196217.; http://hdl.handle.net/2117/2702; Peer reviewed