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Characterization of ankle function during stair ambulation

Gates, Deanna H. and Lelas, Jennifer L. and Della Croce, Ugo and Herr, Hugh and Bonato, Paolo (2004) Characterization of ankle function during stair ambulation. In: EMBC 2004: 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society: conference proceedings: linkages for innovation in biomedicine, 1-5 September 2004, San Francisco (CA), USA. Piscataway, IEEE. Vol. 6. p. 4248-4251. ISBN 0-7803-8439-3. Conference or Workshop Item.

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DOI: 10.1109/IEMBS.2004.1404184


The aim of this study was to examine the ankle joint during level walking, stair ascent, and stair descent to determine models for use in the design of prosthetic and orthotic systems. Ten healthy subjects were asked to walk (1) across a level walkway, (2) up, and (3) down an instrumented stairway. Sagittal plane kinematic and kinetic data were analyzed to obtain ankle biomechanics during the stance phase of each task. Each stance phase was broken down into sub-phases based on the power trajectory. The ideal model was taken to be the simplest combination of mechanical elements (springs, dampers, and torque actuators) that could reproduce the patterns observed in ankle biomechanics. Besides, we studied the transitions from level walking to stair ascent and from stair descent to level walking and showed that mechanical elements can be used to model these transitions as well. These results are promising to the design of next generation ankle orthotic and prosthetic systems because they show that relatively simple mechanical elements can be utilized to mimic ankle biomechanics.

Item Type:Conference or Workshop Item (Paper)
ID Code:2685
Uncontrolled Keywords:Ankle joint, stair ambulation, orthotic systems, biomechanics
Subjects:Area 09 - Ingegneria industriale e dell'informazione > ING-INF/06 Bioingegneria elettronica e informatica
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze biomediche
Publisher Policy:Depositato in conformità con la politica di copyright dell'Editore
Deposited On:18 Aug 2009 10:08

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