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A forward dynamic modelling investigation of cause-and-effect relationships in single support phase of human walking

McGrath, MP, Howard, D and Baker, RJ 2015, 'A forward dynamic modelling investigation of cause-and-effect relationships in single support phase of human walking' , Computational and Mathematical Methods in Medicine, 2015 , pp. 1-9.

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Mathematical gait models often fall into one of two categories: simple and complex. There is a large leap in complexity between model types, meaning the effects of individual gait mechanisms get overlooked. This study investigated the cause-and-effect relationships between gait mechanisms and resulting kinematics and kinetics, using a sequence of mathematical models of increasing complexity. The focus was on sagittal plane and single support only. Starting with an inverted pendulum (IP), extended to include a HAT (head-arms-trunk) segment and an actuated hip moment, further complexities were added one-by-one. These were a knee joint, an ankle joint with a static foot, heel rise, and finally a swing leg. The presence of a knee joint and an ankle moment (during foot flat) were shown to largely influence the initial peak in the vertical GRF curve. The second peak in this curve was achieved through a combination of heel rise and the presence of a swing leg. Heel rise was also shown to reduce errors in the horizontal GRF prediction in the second half of single support. The swing leg is important for centre-of-mass (CM) deceleration in late single support. These findings provide evidence for the specific effects of each gait mechanism.

Item Type: Article
Schools: Schools > School of Health Sciences > Centre for Health Sciences Research
Schools > School of Computing, Science and Engineering
Journal or Publication Title: Computational and Mathematical Methods in Medicine
Publisher: Hindawi
ISSN: 1748-670X
Related URLs:
Funders: Non funded research
Depositing User: Prof Richard Baker
Date Deposited: 06 Jan 2016 12:14
Last Modified: 21 Mar 2016 09:01

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