Thesis (M.S.)--University of Michigan, 1992.

Thesis (M.S.)--University of Michigan, 1993.

Thesis (M.S.)--University of Michigan, 1992.

Thesis (M.S.)--University of Michigan, 1992.

Thesis (M.S.)--University of Michigan, 1993.

Yes / Introduction: To investigate the reliability and variability of Video Rasterstereography (VR) measurements of the spine and pelvis, for eight proposed standing postures, in order to help define an optimal standing position for erect pelvis radiography. Methods: Surface topography data were collected using the formetic 4D dynamic modelling (Diers) system. 61 healthy participants were recruited; each participant performed eight different standing positions. Four positions were performed with the feet shoulder width apart and parallel, and four positions were performed with the feet shoulder width apart and internally rotated. For the upper extremity, each of the (two sets of) four positions were performed with different arm positions (arms by the sides, arms crossed over the chest, arms 30° flexed and touching the medial end of the clavicle, arms 30° flexed with the hands holding a support). Three sets of surface topography were collected in the eight positions (n = 24). The variability was assessed by calculating standard error of the measurement (SEm) and the coefficient of variation (CV). Reliability was assessed using intra-class correlation coefficients (ICC ± 95% CI). Results: No significant differences in the SEm were found between the three paired measurements for all standing positions (P > 0.05). ICC values demonstrated excellent reliability for all measurements across the eight standing positions (range 0.879–1.00 [95% CI 0.813–1.00]). Conclusion: Evaluating eight standing positions radiographically would be unethical as it would involve repeat radiation exposures. Using the formetic 4D dynamic modelling (Diers) system, provides an alternative and has shown that there was only a minimal, non-statistically significant, differences between the eight different standing positions. / KA is supported by the Hashemite University/ Jordan.

Reproduction de : Thèse d' exercice : Médecine spécialisée : Nancy 1 : 2002. / Thèse : 2002NAN11139. Titre provenant de l'écran-titre.

No description available.

Thesis (Ph. D.)--University of Texas at Austin, 2004. / Supervisor: Guy J. Manaster. Vita. Includes bibliographical references.

Orientadores: Heloisa Amelia de Lima Castro, Fausto Bérzin / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicabaca / Made available in DSpace on 2018-07-22T01:14:42Z (GMT). No. of bitstreams: 1 Basanelli_Renata_M.pdf: 3989175 bytes, checksum: 2cfa6bf5175af07da8e794dec1570268 (MD5) Previous issue date: 1997 / Resumo: Este trabalho visa registrar a atividade eletromiográfica dos músculos íliocostallombar (ICL), glúteo máximo (GM), reto do abdome (RA) e reto da coxa (RC) na postura ereta relaxada normal e com as alterações provocadas por elevações nos calcanhares, como ocorre com uso de sapatos de salto, de 2,0, 4,0, 6,0 e 11,0 cm. Para registro dos exames utilizou-se um eletromiógrafo VIKING II de 8 canais, com eletrodos de superficie tipo Beckman, em 10 voluntários"do sexo masculino, na faixa etária entre 16 e 25 anos, sem nenhuma alteração postural considerada patológica. Esta condição foi respeitada com a obtenção da história clínica e exame fisico dos voluntários com uso de um espondilômetro. Os resultados, submetidos a . análise gráfica descritiva a partir da média dos valores de RMS e análise, estatística não paramétrica, mostram que: o m. ICL apresenta-se mais ativo nas posições em que os voluntários estão em pé relaxados sem elevação nos calcanhares e com elevação nos mesmos de 2 cm e menos ativo com os indivíduos utilizando 6 cm de altura de plataforma. O m. GM produziu atividade elétrica relativamente constante em todas as posições, sendo a maior na posição de 11,0 cm de plataforma e a menor com 4,0 cm. Com relação ao m. RC, nas plataformas 11,0 e 6,0 cm apresentou maior atividade ellétrica e a menor na plataforma 4,0 cm. O m. RA prod1J1Ziu atividade eletromiográfica média e crescente à medida em que a plataforma era aumentada de 0,0 para 2,0, depois 4,0, 6,0 e fmalmeNte 11,0 cm de altura. Com esses resultados analisados pudemos concluir que, dos milisculos estudados o mais ativo é o ICL e o menos solicitado é o GM, na postura ereta relaxada, sendo comprovada a importância de todos os músculos estudados nesta posição. A condição que exige menor consumo energético é com uso da plataforma (salto) de 4,0 cm, não sendo portanto a ausência de elevação (salto zero) a melhor para o descanso na, postura ortostática relaxada / Abstract: This task intends to registers the eleetromyographie aetivity of the muscles ilioeostalis lumbar (ICL), gluteus maximus (GM), reetus abdominis (RA) and reetus femoris (RF) in the normal upright postural relaxed and with the alterations provoked by rises on the heels, as it happens when wearing high heels shoes, of 2,0, 4,0, 6,0 e 11,0 eentimeters. For that utilized an eleetromyography VIKING 11 with 8 ehanels, with surfaee eleetrodes Beekman to registrate the eJÇames in 10 subjeets, between 16 and 25 yers old, with no postural ehange eonsidered pathologie. This eondition was respeeted with the obtainment of the elinieal history and phisieal exame of the subjéets using one espondilometer. The results, submeted the graphie analises deseriptive after the average of -the values RMS and statistie analyses no parametrie, show that, the m. ICL shows more aetive in the positions where the people are up relaxed without elevations in the heels and with elevation in 2 em and less aetive with the people wearing 6 em of high on the plataform. The m. GM produeed eleetrieal aetivity relatively eonstant in alI position, being the biggest in the positon 11,0 em of platform and the smalIest with 4,0 em. As for the m. RF, on the platform 11,0 and 6,0 em apresented more eleetrieal aetivity and the least on the platform with 4,0 em . The m. RA produeed eleetromygraphie aetivity average and crescent according to the platfmID was being elevated fi;om 0,0 to 2,0, after 4,0 and 6,0 and fmaIJy increased 11,0 cm of high. With these results analysed we could drow that, with the muscles studied the most active is the ICL and the less solicited is GM, in the upright postural relaxed, being confumed the importance of all; musdes studied in this position. The conditionthat require less energetic consume is with the use of platform with 4,0 cm, not being therefore the absence of elevation (zero) the best for the rest in upright position / Mestrado / Biologia e Patologia Buco-Dental / Mestre em Ciências