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Dissertations / Theses on the topic 'Clinical Gait Analysis'
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Trinler, Ursula Kathinka. "Muscle force estimation in clinical gait analysis." Thesis, University of Salford, 2016. http://usir.salford.ac.uk/39257/.
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Neuro-musculoskeletal impairments are a substantial burden on our health care system as a consequence of disease, injury or aging. A better understanding of how such impairments influence the skeletal system through muscle force production is needed. Clinical gait analysis lacks in a sufficient estimation of individual muscle forces. To date, joint moments and EMG measurements are used to deduce on the characteristics of muscle forces, however, known limitations restrain a satisfying analysis of muscle force production. Recent developed musculoskeletal models make it possible to estimate individual muscle forces using experimental kinematic and kinetic data as input, however, are not yet implemented into a clinical gait analysis due to a wide range of different methods and models and a lack of standardised protocols which could be easily applied by clinicians in a routine processing. This PhD thesis assessed the state of the art of mathematical modelling which enables the estimation of muscle force production during walking. This led into devising a standardised protocol which could be used to incorporate muscle force estimation into routine clinical practice. Especially the input of clinical science knowledge led to an improvement of the protocol. Static optimisation and computed muscle control, two mathematical models to estimate muscle forces, have been found to be the most suitable models for clinical purposes. OpenSim, a free available simulation tool, has been chosen as its musculoskeletal models have been already frequently used and tested. Furthermore, OpenSim provides a straight forward pipeline called SimTrack including both mathematical models. Minor and major adjustments were needed to adapt the standard pipeline for the purposes of a clinical gait analysis to be able to create a standardised protocol for gait analyses. The developed protocol was tested on ten healthy participants walking at five different walking speeds and captured by a standard motion capture system. Muscle forces were estimated and compared to surface EMG measurements regarding activation and shape as well as their dependence on walking speed. The results showed a general agreement between static optimisation, computed muscle control and the EMG excitations. Compared to the literature, these results show a good consistency between the modelling methods and surface EMG. However, some differences were shown between mathematical models and between models and EMG, especially fast walking speeds. Additionally, high estimated activation peaks and uncertainties within the estimation process point out that more research needs to be undertaken to understand the mechanisms of mathematical models and the influence of different modelling parameters better (e.g. characteristics of muscle-tendon units, uncertainties of dynamic inconsistency). In conclusion, muscle force estimation with mathematical models is not yet robust enough to be able to include the protocol into a clinical gait analysis routine. It is, however, on a good way, especially slow walking speeds showed reasonable good results. Understanding the limitations and influencing factors of these models, however, may make this possible. Further steps may be the inclusion of patients to see the influence of health conditions.
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Tan, Junjay. "Advancing clinical gait analysis through technology and policy." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/53326.
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Thesis (S.M. in Technology and Policy)--Massachusetts Institute of Technology, Engineering Systems Division, Technology and Policy Program; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2009.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Includes bibliographical references (p. 161-165).
Quantitatively analyzing human gait biomechanics will improve our ability to diagnose and treat disability and to measure the effectiveness of assistive devices. Gait analysis is one technology used to analyze walking, but technical as well as economic, social, and policy issues hinder its clinical adoption. This thesis is divided into two parts that address some of these issues. Part I focuses on the role public policies have in advancing gait analysis. Through an analysis of gait analysis technologies, case studies of MRI and CT Angiography, and a high-level analysis of data standards used in gait analysis, it concludes that policies cannot directly create the institutional structures and the data standards required to advance gait analysis as a clinical diagnostic tool. Only through indirect means, such as research funding, can policies support the development of organizations to take ownership of gait analysis technologies. Part I also concludes that policies should not fund development of gait technologies but instead should fund research units working on data standards and accurate human body models. Part II focuses on a technical issue in gait analysis, namely, how to address uncertainties in joint moment calculations that occur from using different body segment inertial parameter estimation models. This is identified as a technical issue needing attention from our broader policy analysis in Part I. Using sensitivity studies of forward dynamics computer simulations coupled with an analysis of the dynamical equations of motion, Part II shows that joint moment variations resulting from different segment inertial parameters are significant at some parts of the gait cycle, particularly heel strike and leg swing.
(cont.) It provides recommendations about which segment inertial parameters one should estimate more accurately depending on which joints and phases of the gait cycle one is interested in analyzing.
by Junjay Tan.
S.M.
S.M.in Technology and Policy
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Jenkins, Sian M. "Lower limb modelling for children in clinical gait analysis." Thesis, University of Oxford, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.400179.
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Barton, Gabor J. "Visualisation of clinical gait analysis data using neural networks." Thesis, Liverpool John Moores University, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.436553.
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Arendse, Regan Emile. "The application of clinical gait analysis to running injuries." Doctoral thesis, University of Cape Town, 2005. http://hdl.handle.net/11427/8643.
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Includes bibliographical references.Clinical evaluation of the injured runner requires identification and correction of the multiple factors commonly implicated in running injury. Effective management of running injuries requires that the concerned health professional identify all implicated factors. In this regard it is essential that the relationship between running style and injury he determined, because if there is an association between the gait analysis variables descriptive of running style and injury, these would be important in the management of the injured runner. The Gait Analysis Laboratory at the Sports Science institute of South Africa and the University of Cape Town with its three-dimensional Vicon 370 motion analysis system and Advanced Medical Technology industry® strain gauge force platform is appropriate for collecting data to study running style. These data include the movement patterns and estimated mechanical power and work required to effect the observed movement of the ankle and knee. The forces applied by the supporting surfaces on the runners were collected. The data captured with the Workstation® programme (Oxford Metric, Oxford, England), was processed with GaitLab® (Kiboho Publishers, Cape Town, South Africa), collated in Excel ® (Microsoft Corporation, Redmond, USA) and statistically analysed (StatSoft, Inc. (2000). STATISTICA for Windows [Computer program manual]. Tulsa, OK, USA). In this thesis a series of studies are presented with the aim of determining the relevance of running style to the assessment of the injured runner and the conventional treatment methods used to treat common running injuries.
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Cloete, Teunis. "Benchmarking full-body inertial motion capture for clinical gait analysis." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/2922.
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MScEngThesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2009.
Clinical gait analysis has been proven to greatly improve treatment planning and monitoring of patients suffering from neuromuscular disorders. Despite this fact, it was found that gait analysis is still largely underutilised in general patient-care due to limitations of gait measurement equipment. Inertial motion capture (IMC) is able to overcome many of these limitations, but this technology is relatively untested and is therefore viewed as adolescent. This study addresses this problem by evaluating the validity and repeatability of gait parameters measured with a commercially available, full-body IMC system by comparing the results to those obtained with alternative methods of motion capture. The IMC system’s results were compared to a trusted optical motion capture (OMC) system’s results to evaluate validity. The results show that the measurements for the hip and knee obtained with IMC compares well with those obtained using OMC – with coefficient-of-correlation (R) values as high as 0.99. Some discrepancies were identified in the ankle-joint validity results. These were attributed to differences between the two systems with regard to the definition of ankle joint and to non-ideal IMC system foot-sensor design. The repeatability, using the IMC system, was quantified using the coefficient of variance (CV), the coefficient of multiple determination (CMD) and the coefficient of multiple correlation (CMC). Results show that IMC-recorded gait patterns have high repeatability for within-day tests (CMD: 0.786-0.984; CMC: 0.881-0.992) and between-day tests (CMD: 0.771-0.991; CMC: 0.872-0.995). These results compare well with those from similar studies done using OMC and electromagnetic motion capture (EMC), especially when comparing between-day results. Finally, to evaluate the measurements from the IMC system in a clinically useful application, a neural network was employed to distinguish between gait strides of stroke patients and those of able-bodied controls. The network proved to be very successful with a repeatable accuracy of 99.4% (1/166 misclassified). The study concluded that the full-body IMC system produces sufficiently valid and repeatable gait data to be used in clinical gait analysis, but that further refinement of the ankle-joint definition and improvements to the foot sensor are required.
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Bruening, Dustin A. "A kinetic multi-segment foot model with preliminary applications in clinical gait analysis." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 221 p, 2009. http://proquest.umi.com/pqdweb?did=1896923151&sid=3&Fmt=2&clientId=8331&RQT=309&VName=PQD.
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NAGA, SOUMYA. "AN EFFICIENT ALGORITHM FOR CLINICAL MASS CENTER LOCATION OF HUMAN BODY." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1131323551.
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Lindberg, Lena. "Usability in a clinical context: Redesigning the user interface of a gait analysis system." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-135946.
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Gait analysis can be described as a study of human walking patterns. This is very useful in health care, since gait analysis can reveal important information about a patient, and be an aid in diagnosis and rehabilitation. Today gait analysis is done either by qualitative visual observation of the patient, or in resource demanding and advanced laboratory settings. Many studies have been done in the search for new technical solutions that enables quantitative gait analysis outside of the laboratory. The goal of this thesis was to evaluate the usability of a new gait analysis system and to find out how the user interface could be better adapted to the end user’s needs and goals. This was done by defining and using suitable methods for learning about the users, evaluating the system and by defining usability in a clinical setting. A redesigned prototype was then developed and tested. It was found that the original user interface had many usability issues and was in need of better adaption to the intended user group. Through user research personas and key user needs could be determined that became the basis for the design work, along with guidelines from previous studies within the field. The redesigned prototype was tested on potential end users. It was in this study determined that semi-structured interviews are suitable for learning about the users. Usability evaluation should preferably be done using a combination of evaluation that involves real end users and evaluation by usability experts. Guidelines for usability in clinical systems could also be defined. Considering the redesigned prototype, the users saw a great potential, and could see themselves using it in the future. The testing determined that the redesigned prototype managed to solve many of the usability issues found in the original design.
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Akhlaghi, Florin. "An in-shoe biaxial shear force transducer utilising piezoelectric copolymer film and the clinical assessment of in-shoe forces." Thesis, University of Kent, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.259679.
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Galindo-Zamora, Vladimir [Verfasser]. "Selected clinical studies on canine joint function and morphology using computerized gait analysis and diagnostic imaging / Vladimir Galindo-Zamora." Hannover : Bibliothek der Tierärztlichen Hochschule Hannover, 2013. http://d-nb.info/1030142491/34.
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Barrance, Jane. "The development and use of a gait analysis force plate walkway intended for use in the routine clinical context." Thesis, University of Surrey, 1993. http://epubs.surrey.ac.uk/843516/.
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It has been suggested that a long force plate walkway measuring vertical force only might be useful as a stand-alone tool for gait analysis in the routine clinical context. This project addressed the design and validation of such a walkway. The project achieved its objectives of developing a gait analysis walkway system from an incomplete prototype, calibrating it and testing it using volunteers in order to assess its usefulness in the routine clinical context. A pair of walkway plates were designed and built. Commercial transducers and signal conditioning equipment were chosen and installed. Fixings to attach the walkway to the floor were designed, built and installed. Software was written enabling the user to record, recall and output data, incorporating algorithms which calculate various parameters of gait automatically for each walk. The walkway was calibrated under static and dynamic loads and tested with normal subjects. It was subsequently assessed using volunteers with gait pathology: 16 amputees, 6 elderly joint replacement subjects and 4 others. The walkway was shown to be capable of producing reliable, repeatable data in which the intended gait parameters were clearly displayed. Some aspects of the data quality remained to be improved before the system would be fully ready for clinical application. No serious practical problems were shown except that, in common with other methods of gait analysis, the system could only produce statistically significant results with subjects who can complete an adequate number of traverses at an adequate speed range. Useful information was obtained on how to improve the hardware and software and protocol so that the technique could be optimised so that it could have the best possible chance of being clinically useful. It will be necessary to try out these improvements and to show whether the users can interpret the output to form useful conclusions. Recommendations for further work are given.
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Joss, Brendan Keith. "Clinical and biomechanical outcomes following unicondylar knee arthroplasty with Preservation fixed and mobile bearing tibial components." University of Western Australia. School of Surgery and Pathology, 2007. http://theses.library.uwa.edu.au/adt-WU2007.0079.
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[Truncated abstract] Unicondylar knee arthroplasty (UKA) has re-emerged as a successful treatment option for isolated single compartment tibio-femoral joint osteoarthritis. However despite its increasing use, controversy still remains over fixed or mobile bearing tibial components, as there is a lack to prospective randomised studies reported in the literature. In addition, the theoretical advantages of the mobile bearing for knee kinematics, kinetics and clinical outcome have not been evaluated in vivo. The aim of this research study was to explore the clinical and biomechanical outcomes of the fixed and mobile bearing UKA. . . . When the results for the both studies were combined, utilising the Preservation and MG fixed bearing prostheses, there was a significant relationship between knee adduction moment, and a poor prognosis predicted from RSA. Those patients with translation or rotation of the tibial component in any direction above 1mm and 1.5 degrees respectively were considered to have a poor prognosis for long term fixation. Of the 28 patients, the 8 patients considered to have a poor prognosis, had increased knee adduction moments post-surgery (mean difference = 1.66Nm.kg-1, p = 0.007). There was no difference between the groups for knee flexion moment (mean difference 0.16Nm.kg-1, p = 0.844). Pre-surgery gait was unable to predict the post-surgery outcome, due to the significant changes in gait from pre- to post-surgery. Care must taken when implanting the Preservation mobile bearing prosthesis, as long term outcome is questionable. The mobile bearing prosthesis also produced the worst clinical outcome, however the theoretical advantages of the mobile bearing does not affect gait. Gait analysis is a useful tool to identify patient who are overloading their prosthesis, leading to potential early failure. Identification of these gait patterns can allow for early intervention to reduce joint load, and possible extend the longevity of the prosthesis.
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Hannink, Julius [Verfasser], Björn M. [Akademischer Betreuer] Eskofier, Björn M. [Gutachter] Eskofier, Lorenzo [Gutachter] Chiari, and Jochen [Gutachter] Klucken. "Mobile Gait Analysis : From Prototype towards Clinical Grade Wearable / Julius Hannink ; Gutachter: Björn M. Eskofier, Lorenzo Chiari, Jochen Klucken ; Betreuer: Björn M. Eskofier." Erlangen : FAU University Press, 2019. http://d-nb.info/1182682634/34.
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Hattori, Tomokazu. "Development of personal computer based clinical motion analysis system and gait study of trunk and pelvis movements in hip patients with functional leg length discrepancy." Thesis, University of Strathclyde, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311868.
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Stief, Felix [Verfasser], Ansgar Akademischer Betreuer] Schwirtz, and Andreas B. [Akademischer Betreuer] [Imhoff. "Development of a Gait Analysis Model and its Clinical Relevance for the Treatment of Patients With Varus Malalignment of the Knee / Felix Stief. Gutachter: Andreas Imhoff. Betreuer: Ansgar Schwirtz." München : Universitätsbibliothek der TU München, 2011. http://d-nb.info/1019854022/34.
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Riceputi, Giulia. "Il protocollo anatomico piede "Shriners Hospital for Children Greenville" (SHCG Foot Model) : estrazione delle curve di normalità e applicazioni in clinica." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.
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Questo progetto di tesi nasce per essere di supporto ad un’esigenza del Laboratorio di Analisi del Movimento e Biomeccanica (LAMB) dell’ospedale “Sol et Salus” (RN) di approfondire lo studio della cinematica del piede, con il proposito di fornire diagnosi funzionali più dettagliate a pazienti con deformità podaliche. L’obiettivo di questo progetto era di studiare il protocollo piede multi-segmento “Shriners Hospital for Children Greenville (SHCG) Foot Model” attraverso un sistema stereofotogrammetrico optoelettronico, soffermandosi sulla produzione delle curve di normalità e sull’applicazione in clinica del protocollo, in particolare simulando il posizionamento dei marker su piede equino-varo-supinato.
Per raggiungere questi obiettivi, sono stati utilizzati due raccolte dati. La prima, su 8 soggetti sani, ha permesso di ottenere le curve di normalità per i 12 angoli del piede calcolati dal protocollo. Le curve ottenute presentano una buona sovrapposizione con quanto è presente in letteratura e saranno utilizzate come riferimento normativo per i futuri esami clinici del laboratorio.
La seconda, condotta su 4 soggetti sani, aveva come obiettivo lo studio della robustezza del protocollo a uno spostamento predefinito di 4 marcatori: i pazienti a cui viene applicato il protocollo in clinica possono presentare delle deformità di piede tali da non consentire il posizionamento standard dei marcatori. Questa analisi ha permesso di capire quali angoli siano robusti allo spostamento dei marcatori e quali invece debbano essere commentati con cautela, o meglio con consapevolezza degli effetti di tale riposizionamento. Inoltre, un angolo -l’angolo fra retropiede e gamba nel piano frontale– ha presentato effetti differenti tra piede destro e sinistro, suggerendo l’opportunità di ulteriori approfondimenti.
Infine, si è acquisito un caso clinico, una paziente con piede cavo, in cui si sono evidenziate le differenze tra paziente e curve di normalità ricavate in questa tesi.
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Alves, Ana Catarina Eloy. "Short-term effects of underwater treadmill therapy on ground reaction forces of canine orthopaedic patients." Master's thesis, Universidade de Lisboa, Faculdade de Medicina Veterinária, 2020. http://hdl.handle.net/10400.5/19693.
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Dissertação de Mestrado Integrado em Medicina VeterináriaThis dissertation aimed to use kinetic gait analysis to study the effects of an underwater treadmill therapy (UWT) session on ground reaction forces of dogs with lameness caused by an orthopaedic condition, located in one or both contralateral limbs of a pair. Fourteen clientowned dogs presenting appendicular orthopaedic conditions were recruited. All dogs had previously undergone UWT. The nine selected candidates were divided into two groups: Group A comprised dogs diagnosed with an orthopaedic condition in the forelimbs, and Group B individuals diagnosed with orthopaedic conditions in the hindlimbs. Pressure plate gait analysis was performed to determine ground reaction forces baseline data of all individuals. Afterwards, the dogs completed an UWT session, and gait analysis was repeated to determine postsession values. Peak and impulse of vertical forces (PFz and IFz), stance phase duration (SPD), paw pressure contact area (PCA), and step length were measured. A correlation between step length and withers height was assessed using the collective data of all participants. Contralateral limb pair symmetry was calculated using a symmetry index (SI) for the parameters PFz, IFz, SPD and PCA (SIPFz, SIIFz, SISPD and SIPCA, respectively). Nonlame dogs were excluded, using a SI cut-off value of <3% for PFz and IFz between contralateral limbs. All participants presented baseline hindlimb lameness, regardless of their diagnosis. Before and after measurements were evaluated using a paired student t-test. No statistically significant alterations were observed in any of the parameters. However, baseline and post-session values showed a strong positive correlation in Group A step length and forelimb SIPFz and SIIFz, as well as in Group B step length, mean velocity, hindlimb SIPFz and forelimb SIPCA. In Group B, post-UWT measurements showed an overall decrease in hindlimb SIPFz. In both groups, mean SIPCA increased in the forelimbs and decreased in the hindlimbs. Mean step length increased in 6 dogs and remained equal in 2 dogs. Step length and withers height exponential correlation presented a R value of 0.78. After UWT, 1 out of the 9 participants was considered nonlame. Further research is required to determine the shortterm effects of UWT in temporospatial and pressure gait parameters of dogs with orthopaedic lameness.
RESUMO - EFEITOS A CURTO-PRAZO DE HIDROTERAPIA EM PASSADEIRA AQUÁTICA NAS FORÇAS DE REAÇÃO AO SOLO DE CANÍDEOS COM PATOLOGIA ORTOPÉDICA - Esta dissertação teve como objetivo estudar o efeito de uma sessão de terapia em passadeira aquática (UWT) nas forças de reação ao solo de cães com claudicação de origem ortopédica, localizada em um ou ambos membros do mesmo par, através de análise de movimento. Foram pré-avaliados 14 cães que apresentavam condições ortopédicas apendiculares, e já submetidos a UWT anteriormente. Os 9 candidatos selecionados foram separados em dois grupos: o Grupo A incluiu cães com claudicação dos membros torácicos e o Grupo B indivíduos com claudicação dos membros pélvicos. Realizou-se análise de movimento com placa de pressão para determinar os valores base das forças de reação ao solo. Depois de terem completado uma sessão de UWT, os animais foram novamente submetidos a análise de movimento para determinar os valores pós-sessão. Mediu-se o pico e impulso das forças verticais (PFz e IFz), duração da fase de estação (SPD), área de contacto do membro (PCA), e comprimento da passada. A correlação entre o comprimento da passada e a altura do garrote foi avaliada usando os dados de todos os participantes. A simetria dos membros contralaterais foi calculada através de um índice de simetria (SI) para os parâmetros PFz, IFz, SPD e PCA (SIPFz, SIIFz, SISPD and SIPCA). Cães com um valor de SIPFz e SIIFz inferior a 3% foram considerados não claudicantes e excluídos. Todos os participantes apresentaram valores de claudicação nos membros pélvicos, independentemente do diagnóstico. Os valores pré e pós-UWT foram avaliados com o teste t de student para amostras emparelhadas. Não se observaram alterações significativas em nenhum dos parâmetros. No entanto, no Grupo A os valores pré e pós-UWT do comprimentos da passada, e do SIPFz e SIIFz nos membros torácicos demonstraram uma forte correlação positiva, o que também se verificou nos valores do comprimento da passada, velocidade média, SIPFz dos membros pélvicos e SIPCA dos membros torácicos no Grupo B. No Grupo B, observou-se uma diminuição geral no SIPFz dos membros pélvicos. Em ambos grupos, o valor médio de SIPCA aumentou nos membros torácicos e diminuiu nos pélvicos. O valor médio do comprimento da passada aumentou em 6 cães, e manteve-se inalterado em 2. A correlação exponencial entre o comprimento da passada e a altura do garrote apresentou um valor de R = 0.78. Após UWT, 1 dos 9 participantes passou a ser considerado não claudicante. Investigação adicional é necessária para determinar os efeitos a curto prazo da UWT nos parâmetros temporo-espaciais e pressão ao solo em cães com claudicação de origem ortopédica.
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Renner, Kristen Elizaberth. "Assessing Limb Symmetry using the Clinically Accessible loadsol®." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/89102.
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Decreased gait symmetry has been correlated with an increased fall risk, abnormal joint loading and decreased functional outcomes. Therefore, symmetry is focused on in the rehabilitation of many patient populations. Currently, load based symmetry is collected using expensive and immobile devices that are not clinically accessible, but there is a clinical need for an objective measure of loading symmetry during daily tasks like walking. Therefore, the purpose of this dissertation was to 1) assess the validity and reliability of the loadsol® to capture ground reaction force data, 2) use the loadsol® to determine the differences in symmetry between adults with a TKA and their healthy peers and 3) explore the potential of a commercially available biofeedback system to acutely improve gait symmetry in adults. The results of this work indicate that the loadsol® is a valid and reliable method of collecting loading measures during walking in both young and older adults. TKA patients who are 12-24 months post-TKA have lower symmetry in the weight acceptance peak force, propulsive peak force and impulse when compared to their healthy peers. Finally, a case study with four asymmetric adults demonstrated that a 10-minute biofeedback intervention with the loadsol® resulted in an acute improvement in symmetry. Future work is needed to determine the potential of this intervention to improve symmetry in patient populations and to determine whether the acute response is retained following the completion of the intervention.Doctor of Philosophy
Symmetry during walking is a valuable attribute as asymmetry has been correlated with an increased fall risk and decreased mobility. Currently, load based symmetry is collected using expensive and immobile devices that are not clinically accessible. As a result, there is a critical need for a system that can objectively measure load and loading symmetry during rehabilitation and everyday tasks in a variety of settings. A new device has been developed (loadsol®) that could potentially fill this need. Before it can be used to assess and treat patients, the loadsol® needed to be assessed for accuracy and reliability in both older and younger adults and at various speeds. Then we needed to determine if the loadsol® can be used to look at the levels of symmetry in patients who have had a knee replacement compared to their healthy peers. Finally, we tested a visual biofeedback intervention with the loadsol® to see if this intervention was able to improve symmetry. We found that the loadsol® is accurate and reliable. Patients with a knee replacement were less symmetric than their age matched peers. Finally, in a small study, the visual biofeedback intervention improved symmetry during walking in a group of people with less than 90% symmetry. Future work is needed to explore the potential of this biofeedback intervention to improve symmetry in various patient populations and to determine the extent to which patients are able to retain these improvements.
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Dardari, Luca. "Modellazione muscoloscheletrica subject-specific: applicazione a casi clinici e analisi delle incertezze." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/11660/.
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Lo sviluppo sistematico di modelli subject-specific computerizzati per l’analisi di trattamenti personalizzati è attualmente una realtà. Infatti di recente sono state sviluppate molte tecnologie per la creazione di modelli virtuali ad elementi finiti, che ricreano accuratamente le geometrie specifiche del soggetto e tutte le proprietà fondamentali per ricreare le capacità motorie, basandosi su analisi d’immagine quantitative.
Tuttavia, per determinare le forze agenti sul sistema, necessitiamo di una intera analisi di cammino, solitamente in combinazione con uno studio di simulazione di dinamica inversa. In questo elaborato, mi propongo di illustrare i procedimenti per creare un modello subject-specific partendo da dati di imaging (da tomografie computerizzate) di un paziente reale affetto da displasia congenita dell’anca, e gli strumenti che ci permettono di effettuare le simulazioni del modello, al fine di ottenere informazioni quantitative circa le grandezze che governano la dinamica del cammino del paziente.
Il corpi rigidi del modello scheletrico saranno costruiti mediante la tecnica della segmentazione 3D, e verranno utilizzati per costruire un sistema articolato dotato di attuatori muscolo-tendinei e giunti articolari a due o tre gradi di libertà. Per conseguire questo obiettivo si farà uso del software, “NMSBuilder”, per poi inserirlo in un programma di simulazione di dinamica del movimento, “OpenSim”, che ci permetterà di calcolare forze muscolari, forze di contatto e momenti articolari del modello.
Questi risultati saranno di fondamentale importanza per studiare riabilitazioni ad hoc per pazienti affetti da DCA che devono essere sottoposti ad artroprotesi totale.
Lo scopo di questo studio sarà anche quello di analizzare la sensibilità delle previsioni dei modelli specifici durante la deambulazione tenendo conto delle incertezze nell'identificazione delle posizioni dei body-landmarks, della massima tensione muscolare e della geometria muscolo-tendinea.
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Barth, Jens Gerhard [Verfasser], Björn [Gutachter] Eskofier, Kamiar [Gutachter] Aminian, and Jochen [Gutachter] Klucken. "Development and Validation of a Mobile Gait Analysis System Providing Clinically Relevant Target Parameters in Parkinson's Disease / Jens Gerhard Barth ; Gutachter: Björn Eskofier, Kamiar Aminian, Jochen Klucken." Erlangen : FAU University Press, 2017. http://d-nb.info/1151399795/34.
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Barth, Jens Gerhard Verfasser], Björn [Gutachter] Eskofier, Kamiar [Gutachter] [Aminian, and Jochen [Gutachter] Klucken. "Development and Validation of a Mobile Gait Analysis System Providing Clinically Relevant Target Parameters in Parkinson's Disease / Jens Gerhard Barth ; Gutachter: Björn Eskofier, Kamiar Aminian, Jochen Klucken." Erlangen : FAU University Press, 2017. http://d-nb.info/1151399795/34.
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Barth, Jens [Verfasser], Björn Gutachter] Eskofier, Kamiar [Gutachter] [Aminian, and Jochen [Gutachter] Klucken. "Development and Validation of a Mobile Gait Analysis System Providing Clinically Relevant Target Parameters in Parkinson's Disease / Jens Gerhard Barth ; Gutachter: Björn Eskofier, Kamiar Aminian, Jochen Klucken." Erlangen : FAU University Press, 2017. http://nbn-resolving.de/urn:nbn:de:bvb:29-opus4-93274.
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Hsu, Chia-Yu, and 許嘉佑. "Clinical Applications of an Accelerometer-based Gait Analysis System in Patients During Rehabilitation." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/s73x7c.
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博士中原大學
生物醫學工程研究所
107
Patients with gait disorder may sufferer from decreased quality of life and reduced survival. Currently, 3-dimentional motion analysis system or force plate system remains gold standard in gait analysis. On the contrary, clinical gait analysis relies largely upon direct observation, walking test, time up and go test, or questionnaires. The results measure by these clinical methods might be interfered by some subjective or objective factors. Thus, the aim of this study is to develop and verify an accessible and reliable gait analysis system in the clinical setting, which may help clinicians or therapists diagnose and evaluate patients with gait disorder during rehabilitation. We also aim to investigate the correlation between the measured gait parameters and certain questionnaire as well as future falls. An infrared-assisted accelerometer-based gait analysis system was used for gait analysis in a regional teaching hospital. 35 healthy subjects, 10 ankle fracture patients, 10 knee fracture patients, and 10 chronic ischemic stroke patients were enrolled. The results showed that walking speed, step length, cadence, trunk movement acceleration root mean square, trunk movement symmetry and regularity all had excellent test-retest reliability in healthy subjects. For patients with ankle fractures during early rehabilitation period, walking speed, step length, cadence, and trunk movement symmetry in vertical axis were significantly lower than those in the control group. Both step length and walking speed were moderately positive correlated with the lower extremity functional scale. Trunk movement acceleration root mean square ratio in medio-lateral axis was highly associated with future falls. For patients with knee fractures, walking speed, step length, cadence, and trunk movement acceleration root mean square significantly decreased. None of the measured gait parameters was significantly associated with the lower extremity functional scale. For stroke patients, walking speed, step length, cadence, trunk movement root mean square, and trunk movement regularity and symmetry in vertical axis decreased significantly. Trunk movement acceleration root mean square ratio in medio-lateral axis, and trunk movement symmetry and regularity in anterior-posterior axis were positively associated with future falls. The infrared-assisted accelerometer-based gait analysis system is reliable in the hospital environment. It also has certain discriminability to differentiate patients with gait disorders during rehabilitation and healthy subjects, which may potentially help clinicians monitor gait quality and rehabilitation outcomes and assess future fall risk.
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Chang, Hsiu Chen, and 張秀禎. "The effects of cycling-cognitive dual-task training in early Parkinson’s disease: evidence from clinical, biochemistry, and quantitative gait analysis." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/52572701054311246738.
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Proença, José Pedro da Silva Gouveia. "Web-based Interface for Tailored Time Series Analysis and Visualization." Master's thesis, 2018. http://hdl.handle.net/10362/65513.
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In the field of movement disorders there is a clear need for more accurate and insightful
metrics to support clinicians in their decision-making process. These metrics should be
easy to understand and get presented to the clinician in an intuitive way, to avoid creating
a wall between clinicians and their patients. This could happen if the information
system that presents these metrics requires too much interaction, if it doesn’t show the
relevant data for each situation or even by delaying the information collection and its
processing. Clinical Decision Support Information Systems have been growing in usage
and usefulness, but still, there are cases of miss-implementations, that don’t put the user
in the first place, or that don’t take into consideration their workflows. This leads to less
effective health care and poorly spent resources.
With this project we will produce a customizable web interface, to integrate such a system,
that must have clinicians and their needs as the first priority. This interface has to be
fast and intuitive, while, at the same time, present useful and clinically relevant metrics.
Additional information will be presented as optional and non-intrusive, not requiring
any input from the user unless he wants to interact with it.
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Guy, Kristina. "Clinical and Spatiotemporal Aspects of Gait: A Secondary Analysis of the Walking Characteristics of Subjects with Sub-acute Incomplete Spinal Cord Injury." Thesis, 2012. http://hdl.handle.net/1807/32464.
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Objective: To describe the walking characteristics of a sample of ambulatory subjects with sub-acute incomplete spinal cord injury (iSCI).
Methods: 52 subjects were included in a secondary analysis of clinical and spatiotemporal measures of walking. The study sample was described as a whole and subsequently divided into subgroups on the basis of 3 clinical factors (etiology, severity, and neurological level of injury) and 4 gait factors (gait aid, velocity, symmetry, and variability).
Results: Clinical and spatiotemporal parameters were highly variable across the study population. Sub–groups with unique gait features were best identified by velocity and variability.
Conclusions: Spatiotemporal measures of walking provide augmented description of walking in the sub-acute iSCI population. Sub-grouping by gait factors warrants further investigation with respect to their ability to act as predictors and modifiers of treatment effect.
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Sen, Koktas Nigar. Phd thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609347/index.pdf.
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Gait analysis is the process of collecting and analyzing quantitative information about walking patterns of the people. Gait analysis enables the clinicians to differentiate gait deviations objectively. Diagnostic decision making from gait data only requires high level of medical expertise of neuromusculoskeletal system trained for the purpose. An automated system is expected to decrease this requirement by a &lsquotransformed knowledge&rsquo
of these experts. This study presents a clinical decision support system for the detecting and scoring of a knee disorder, namely, Osteoarthritis (OA). Data used for training and recognition is mainly obtained through Computerized Gait Analysis software. Sociodemographic and disease characteristics such as age, body mass index and pain level are also included in decision making. Subjects are allocated into four OA-severity categories, formed in accordance with the Kellgren-Lawrence scale: &ldquo
Normal&rdquo
, &ldquo
Mild&rdquo
, &ldquo
Moderate&rdquo
, and &ldquo
Severe&rdquo
. Different types of classifiers are combined to incorporate the different types of data and to make the best advantages of different classifiers for better accuracy. A decision tree is developed with Multilayer Perceptrons (MLP) at the leaves. This gives an opportunity to use neural networks to extract hidden (i.e., implicit) knowledge in gait measurements and use it back into the explicit form of the decision trees for reasoning. Individual feature selection is applied using the Mahalanobis Distance measure and most discriminatory features are used for each expert MLP. Significant knowledge about clinical recognition of the OA is derived by feature selection process. The final system is tested with test set and a success rate of about 80% is achieved on the average.
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Ndayikengurukiye, Didier. "Estimation de cartes d'énergie de hautes fréquences ou d'irrégularité de périodicité de la marche humaine par caméra de profondeur pour la détection de pathologies." Thèse, 2016. http://hdl.handle.net/1866/16178.
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Ce travail présente deux nouveaux systèmes simples
d'analyse de la marche humaine grâce à une caméra de profondeur
(Microsoft Kinect) placée devant un sujet marchant
sur un tapis roulant conventionnel, capables de détecter une marche
saine et celle déficiente. Le premier système repose sur le fait
qu'une marche normale présente typiquement un signal de profondeur
lisse au niveau de chaque pixel avec moins de hautes fréquences, ce qui
permet d'estimer une carte indiquant l'emplacement et l'amplitude
de l'énergie de haute fréquence (HFSE). Le second système analyse
les parties du corps qui ont un motif de mouvement
irrégulier, en termes de périodicité, lors de la marche. Nous
supposons que la marche d'un sujet sain présente partout dans le
corps, pendant les cycles de marche, un signal de profondeur
avec un motif périodique sans bruit. Nous estimons, à partir de la
séquence vidéo de chaque sujet, une carte montrant les zones
d'irrégularités de la marche (également appelées énergie de bruit
apériodique). La carte avec HFSE ou celle visualisant l'énergie de
bruit apériodique peut être utilisée comme un bon indicateur
d'une éventuelle pathologie, dans un outil de diagnostic précoce,
rapide et fiable, ou permettre de fournir des informations sur la
présence et l'étendue de la maladie ou des problèmes (orthopédiques,
musculaires ou neurologiques) du patient. Même si les
cartes obtenues sont informatives et très discriminantes pour une
classification visuelle directe, même pour un non-spécialiste, les
systèmes proposés permettent de détecter
automatiquement les individus en bonne santé et ceux avec des
problèmes locomoteurs.This work presents two new and simple human gait analysis systems based on a depth camera (Microsoft Kinect) placed in front of a subject walking on a conventional treadmill, capable of detecting a healthy gait from an impaired one. The first system presented relies on the fact that a normal walk typically exhibits a smooth motion (depth) signal, at each pixel with less high-frequency spectral energy content than an abnormal walk. This permits to estimate a map for that subject, showing the location and the amplitude of the high-frequency spectral energy (HFSE). The second system analyses the patient's body parts that have an irregular movement pattern, in terms of periodicity, during walking. Herein we assume that the gait of a healthy subject exhibits anywhere in the human body, during the walking cycles, a depth signal with a periodic pattern without noise. From each subject’s video sequence, we estimate a saliency color map showing the areas of strong gait irregularities also called aperiodic noise energy. Either the HFSE or aperiodic noise energy shown in the map can be used as a good indicator of possible pathology in an early, fast and reliable diagnostic tool or to provide information about the presence and extent of disease or (orthopedic, muscular or neurological) patient's problems. Even if the maps obtained are informative and highly discriminant for a direct visual classification, even for a non-specialist, the proposed systems allow us to automatically detect maps representing healthy individuals and those representing individuals with locomotor problems.
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Lalaeva, Anna. "Přístrojová analýza chůze u pacientů s lézí nebo po plastice LCA." Master's thesis, 2011. http://www.nusl.cz/ntk/nusl-300153.
Full textAbstract:
Title: Instrumental Gait Analysis in the ACL Patient Aim: to present an up to date review on the topic of instrumental analysis of straight ahead gait on a plain surface (both over-ground and on a treadmill) in ACL patients (both deficient and reconstructed). A second aim is to introduce the clinician (especially in the field of physiotherapy/rehabilitation) to the topic of gait analysis and its specific use for the ACL patient. Methods: a systematic review on the topic Results The review answers the questions of what instrumentation, phases of gait and variables is best to use/measure for clinical purposes. It also identifies and discusses three main gait strategies used by ACL patients: quadriceps avoidance, knee stiffening, pivot shift avoidance. Keywords: gait, analysis, walking, clinical, instrumental, anterior cruciate ligament, ACL, deficient, reconstruction, injury