Thesis (M.A.)--University of North Carolina at Chapel Hill, 2005. / Includes bibliographical references (leaves 109-114). Also available online (PDF file) by a subscription to the set or by purchasing the individual file.

Thesis (M.A.)--University of North Carolina at Chapel Hill, 2005. / Includes bibliographical references (leaves 109-114).

Submitted in partial compliance with the requirements for the Master’s Degree in Technology: Chiropractic, Durban University of Technology, 2014. / Aim: To determine the effect of long axis manipulation of the third metacarpophalangeal joint (MCP) on articular surface separation, peri-articular soft tissue movement and joint cavitation. Participants: Forty two right-handed healthy individuals between 18 and 28 years of age from the Durban University of Technology campuses, KwaZulu Natal. Methodology: Written informed consent was obtained from each participant. A case history, physical examination and a hand and wrist orthopaedic assessment was conducted for each participant. Study specific data, such as sex, age, height and weight were recorded. A diagnostic ultrasound (US) scan was done to the left third MCP joint for each participant while distractive manipulation was applied to the joint. The presence or absence of audible release was noted and the tension levels applied to the joint was measured with a digital tension meter. Joint surface separation (JSS), synovial membrane position (SMP), gas bubble presence and location were assessed on the US recordings at baseline, just prior to cavitation, at maximum traction and in the post-traction resting joint. IBM SPSS version 20 was used to analyse the data. Independent sample t-tests were used to compare the means between the two groups and the associations were compared using Pearson’s chi square tests. A p value <0.05 was considered as statistically significant. Results: Long axis manipulation resulted in audible release in 22 of the participants (Group and no audible release in 20 of the participants (Group 2). No significant difference in joint surface separation or the synovial membrane position could be established between MCP joints that cavitated and MCP joints that did not cavitate at the baseline, as well as in maximum traction and in the post-procedure resting joint (p > 0.05; t-test). Hyperechoic gas bubbles were present in 21 of the 22 participants of Group 1 and no gas bubbles could be visualised in the participants in Group 2. The presence of intra-articular hyperechoic gas bubbles was highly associated with audible release (p < 0.001; Pearson’s chi square test). Due to the predefined features of cavitation, gas bubble inception was could not be detected in the Group 1 participants prior to cavitation. In Group 1, 95.5% of the gas bubbles were present in the middle third of the joint at maximum traction. At the post traction resting joint evaluation, no gas bubble was evident in 42.9% (n = 9) of the joints; 42.9% (n = 9) indicated bubbles were present only in the dorsal third, whilst 9.5% (n = 2) presented bubbles in the middle and dorsal third; and in one case gas bubbles were seen in the dorsal, middle and ventral thirds of the joint space. The mean manipulative force recorded in participants in which gas bubble inception took place during manipulation was 5.7 kg, and in those with no gas bubble inception was 12 kg. There was a significant difference between the mean traction force applied to those with and to those without a gas bubble appearance (p < 0.001; t-test). Conclusion: No significant differences were observed between the cavitation and non-cavitation groups for the joint surface separation and synovial membrane movement at various stages of manipulation. A significant association was established between the audible release of a joint that was manipulated and the appearance of intra-articular gas bubbles or micro-bubbles. The mean traction force that was required to cause cavitation was significantly lower than the force to which joints with no cavitation were tensioned. The findings concur with those of previous studies that cavitation is a necessary component of joint manipulation.

Orientador: Hans Ingo Weber / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica / Made available in DSpace on 2018-07-22T16:46:12Z (GMT). No. of bitstreams: 1 Menegaldo_LucianoLuporini_M.pdf: 10582841 bytes, checksum: c428ba1320f8aa3abc90149335b8ab75 (MD5) Previous issue date: 1997 / Resumo: O desenvolvimento de próteses neurais para pacientes com lesões crônicas no sistema nervoso central, bem como o estudo do controle motor em pessoas normais, pode encontrar em ferramentas de simulação computacional importantes subsídios. Este trabalho, atendo-se à dinâmica e ao controle da postura em seres humanos, procurou desenvolver uma série de modelos que incorporassem: a mecânica de corpos rígidos, a dinâmica da contração muscular e da excitação neural e um modelo da geometria músculo-esquelética associado. Foi estabelecida uma metodologia para o projeto de um controlador, utilizando o método do LQR, e a matriz pseudo-inversa na distribuição, entre os atuadores músculo-tendíneos dos torques de controle, empregando um modelo inverso da dinâmica da contração. Os resultados de simulações para condições iniciais mostram alguns efeitos da variação das matrizes de ponderação do LQR. Discute-se em seguida o padrão de coordenação muscular obtido / 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. / Mestrado / Mecanica dos Sólidos e Projeto Mecanico / Mestre em Engenharia Mecânica

No description available.

The Anterior Cruciate Ligament (ACL) resists excessive anterior translation and internal rotation of the tibia during athletic activities and stabilizes the knee. In the US, annually, over 200,000 cases of ACL disruption are reported. The impact on the quality of life of the subject and its cost to healthcare is tremendous. The objectives of this study were to determine any significant associations between the size of the tibial eminence and ACL injury and to develop a finite element model for structural analysis. The results suggest that the size of the tibial eminence plays a role in loading the ACL and is therefore a risk factor. In addition to the epidemiological analysis, a finite element model of the knee was developed that with added modifications can be used for complex knee loading situations. The results in this thesis may be used to develop strategies for ACL injury prevention and rehabilitation. / Includes bibliography. / Thesis (M.S.)--Florida Atlantic University, 2014. / FAU Electronic Theses and Dissertations Collection

Thesis. 1978. M.S.--Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING. / Bibliography: leaf 125. / by Avram K. Tetewsky. / M.S.

Thèse doctorat : Génie Mécanique. Biomécanique : Villeurbanne, INSA : 2004. / Thèse rédigée en anglais sauf le chapitre VIII. Titre provenant de l'écran-titre. Bibliogr. p. 247-254.

Dissertation--Ruhr-Universität, Bochum, 2004. / Includes bibliographical references (p. 179-187).

O advento de novas tecnologias tem contribuído para avanços na captura de movimento e sua aplicação exercícios físicos. A utilização da tecnologia de captura de movimentos é atrativa devido a seu baixo custo de aquisição de hardware. Os tratamentos convencionais em fisioterapia são, na sua maioria, de longa duração e repetitivos, o que faz o paciente encarar como algo cansativo e desestimulante, percepção essa que interfere na eficácia terapêutica. Com relação ao levantamento de peso, os jovens atletas têm lesões que podem deixá-los de fora das competições, e algumas destas lesões pode ocorrer devido à falta dos princípios básicos do treinamento do peso. Um sistema de monitoramento pode proporcionar um melhor controle dos pacientes/atletas durante a sessão de tratamento ou treinamento, por meio da monitorização contínua. Esta dissertação apresenta um software para área da fisioterapia e levantamento de peso olímpico, visando auxiliar o fisioterapeuta/treinador no monitoramento dos exercícios executados pelos pacientes/atletas. O BH-Tracking - BioHealth Tracking está disponível, inclusive seu código fonte, sob a licença GNU GPL (General Public License). O software foi implementado com tecnologias de controle por gestos, mapeando o corpo do paciente/atleta e rastreando o exercício durante sua execução. A base do seu funcionamento está no sistema de validação do exercício por comparação de ângulos e referências dos pontos corporais, com modelos de movimentos corretos previamente armazenados. O software fornece, também, o feedback da evolução do paciente ou do atleta analisado, comparando os movimentos de um mesmo exercício ao longo do tratamento/treinamento. / The advent of new technologies has contributed to advances in motion capture and its physical exercise application. The use of motion capture technology is attractive due to its low cost of hardware acquisition. Conventional treatments in physiotherapy are, for the most part, longlasting and repetitive, which makes the patient see it as tiring and discouraging, a perception that interferes with therapeutic efficacy. With regard to weight lifting, young athletes have injuries that may leave them out of competitions, and some of these injuries may occur due to lack of basic principles of weight training. A monitoring system can provide better patient/athlete control during the treatment or training session through continuous monitoring. This dissertation presents software for the area of physiotherapy and Olympic weightlifting, aiming to assist the physiotherapist/coach in monitoring the exercises performed by the patients/athletes. BHTracking - BioHealth Tracking is available, including its source code, under the GNU General Public License (GPL). The software was implemented with gesture control technologies, mapping the patient/athlete’s body and tracking the exercise during its execution. The basis of its functioning is in the system of validation of the exercise by comparison of angles and references of the body points, with models of correct movements previously stored. The software also provides feedback on the evolution of the patient or athlete analyzed, comparing the movements of the same exercise throughout the treatment/training.