The kinematics, temporal and sequential organization of the lower limb joints were assessed during jump downs at a constant height (45 cm) in seven practised subjects under four conditions: (SS) stiff takeoff and landing, (SC) stiff takeoff and compliant landing, (CS) compliant takeoff and stiff landing, and (CC) compliant takeoff and landing surfaces. The timing and sequencing of joint motions were unaffected by the compliance of the takeoff or landing surfaces. During takeoff ankle adjustments may have been influenced by proprioceptive inputs about the takeoff surface compliance, whereas knee adjustments could mean that the landing program interferes with the takeoff. Adjustments prior to, at, and post landing depended on the landing surface compliance and suggest that different strategies might have been employed to control joint motions. This study may provide valuable information on the coordinative strategies used to encounter various surfaces as found in the natural environment.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.56997 |
| Date | January 1992 |
| Creators | Bastien, Madeleine |
| Contributors | McKinley, Patricia A. (advisor) |
| 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 | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science (School of Physical and Occupational Therapy.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001320127, proquestno: AAIMM87743, Theses scanned by UMI/ProQuest. |
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