Mémoire numérisé par la Division de la gestion de documents et des archives de l'Université de Montréal

Bakalauro darbe vertinama 8 klasės moksleivių laikysena stovint sagitalinėje ir frontalinėje plokštumose ir stuburo mobilumas/paslankumas. Tyrime dalyvavo vienos Šiaulių progimnazijos 26 aštuntos klasės moksleiviai. Iš jų 10 merginų ir 16 vaikinų. Tyrimas vyko 2013 metų lapkričio 11 – 15 dienomis. Tyrimu buvo siekiama: 1) įvertinti paauglių statinę laikyseną ir stuburo mobilumą naudojant ZEBRIS CM10 WinSpine Pointer diagnostinę įrangą; 2) atskleisti paauglių subjektyvaus sveikatos vertinimo ir fizinio aktyvumo aspektus. Duomenims įvesti ir rezultatams apdoroti buvo naudotas specializuotas duomenų įvedimo ir statistinės analizės programinis paketas SPSS (20 versija). Atlikta statistinė (vidurkių, Mann – Whitney ir Kruskal – Wallis kriterijai) duomenų analizė. Vertinant paauglių laikyseną buvo remtasi mokslininkų (Arcinavičius, 2004; Muckus, 2006; Neumann, 2010; Saniukas, 2007) nurodytomis normomis. Anketa buvo siekiama atskleisti paauglių subjektyvų sveikatos vertinimą ir fizinį aktyvumą, laisvalaikio pomėgius, kurie buvo lyginami su gautais laikysenos vertinimo duomenimis. Taip buvo siekiama atskleisti gyvensenos veiksnių įtaką paauglių laikysenai. Vertinant paauglių laikyseną statinėje padėtyje nustatyta, kad visiems tiriamiesiems yra pečių ir dubens asimetrija. Tyrimo metu buvo nustatyta, kad dviem paaugliams yra skoliozinė deformacija į dešinę pusę ir dviem paaugliams – į kairę pusę. Nustatyta, kad septynių paauglių krūtininė kifozė yra per daug išreikšta. Tai reiškia, kad... [toliau žr. visą tekstą] / In the Bachelor's work is evaluating 8 class pupils’ standing posture in the sagittal and frontal planes and the spine mobility. In the investigation participated 26 eighth class teenagers one of Šiauliai progymnasium, 10 girls and 16 boys. The investigation took place 11 th – 15 th of November, 2013. When conducting the investigation goal was: 1) to evaluate static posture and spine mobility of teenager using ZEBRIS CM10 WinSpine Pointer diagnostic equipment; 2) reveal teenager‘s subjective assessment of health and physical activity aspects. Statistical analysis of results was implemented (means, Mann-Whitney and Kruskal-Wallis criterions). Evaluating of teenager posture was based on scientists (Arcinavičius, 2004; Muckus, 2006; Neumann, 2010; Saniukas, 2007) specified rate. Using questionnaire the aim was to reveal teenager‘s subjective assessment of health and physical activity, hobies of leisure witch was correlated with postural data assessment. Thus, it was intended to reveal lifestyle factors on teenagers posture. In evaluating the situation in the static position of teenagers posture found that all teenagers have the asymmetry of shoulder and pelvic. Two teenagers have scoliotic deformation of right side and two teenagers have left side scoliotic deformation. In the investigation was found that seven teenagers have too big thoracic kyphosis that exceed the rate. It means that these pupils have kyphotic posture. The analysis of lateral flexion revealed that no one of... [to full text]

In addition to its intrinsic importance during quiet standing, posture also serves as the background for a wide variety of other critical motor tasks. The hierarchical nature of the motor control system suggests that the different layers may be responsible for different aspects of posture. I tested the hypothesis that spinal reflexes are organized according to optimal principles of stability, control accuracy, and energy. I found that there were no globally stable muscle activation patterns for muscles operating near optimal fiber length, suggesting that the intrinsic viscoelastic properties of muscle are insufficient to provide limb stability. However, for stiffer muscles a stable limb could be created by selectively activating muscles based on their moment-arm joint angle relationships. The optimal organization of length and velocity feedback to control and stabilize the endpoint position of a limb could not be produced from a purely muscle controller, but required neural feedback to improve endpoint performance, reduce energetic cost, and produce greater coordination among joints. I found that while muscles at near optimal fiber length were insufficient to provide limb stability, the length feedback provided by the autogenic stretch reflex was sufficient to stabilize. Length feedback was also sufficient to produce the directional tuning of muscle activity and constrained ground reaction forces as is observed in experiments. These results have implications for controlling powered prosthetic devices, suggesting that subdividing the responsibility for stability among hierarchical control structures will simultaneous improve stability and maneuverability of the devices.

Thesis (M.S.)--University of Michigan, 1987.

Thesis (M.S.)--University of Michigan, 1988.

Thesis (M.S.)--University of Michigan, 1988.

Thesis (M.S.)--University of Michigan, 1987.

Thesis (Ph.D.) - University of Queensland, 2004. / Includes bibliography.

Thesis (Ph.D.) - University of Queensland, 2004. / Includes bibliographical references.

Thesis (Ph. D.)--University of Oregon, 2005. / Includes bibliographical references (leaves 115-119). Also available online (PDF file) by a subscription to the set or by purchasing the individual file.