Research related to the control of upright posture and balance has historically focussed on the lower extremities, often treating the trunk as a single, rigid segment. The principal objective of this work, therefore, was to characterize the response of the multiarticular trunk, in healthy individuals, to unexpected support surface translations. Three dimensional trunk motions were captured, in both standing and sitting, during horizontal support surface translations in 8 directions. A 4-segment model, consisting of pelvic, lumbar, upper and lower thoracic segments, was used for all kinematic and kinetic analyses. Electromyographic (EMG) data was simultaneously acquired, bilaterally, from 7 trunk muscles and 1 hip muscle.[...] / La recherche liée au maintien de l'équilibre s'est historiquement concentrée sur les membres inferieurs, traitant souvent Ie tronc comme un segment unique et rigide. L'objectif principal de ce travail était donc, de caractériser la réponse du tronc multi articulaire chez les individus sains, suite a un mouvement inattendu de la surface de support. Le mouvement tridimensionnel du tronc a été capture durant les mouvements horizontaux de la surface de support dans 8 directions, en position debout et assise. Un modèle du tronc comprenant Ie bassin, un segment lombaire, et des segments thoraciques inferieur et supérieur, a été utilise pour les analyses cinématiques et cinétiques. Des données electromyographiques (EMG) bilatérales de 7 muscles du tronc et d'un muscle de la hanche ont été acquises simultanément.[...] fr
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.95656 |
| Date | January 2007 |
| Creators | Preuss, Richard Arthur |
| Contributors | Fung, Joyce (Supervisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | French |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Doctor of Philosophy (School of Physical and Occupational Therapy) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | 3445781, Theses scanned by McGill Library. |
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