Skip to main content

Research Repository

Advanced Search

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

McGrath, MP; Howard, D; Baker, RJ

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


Authors

MP McGrath

RJ Baker



Abstract

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.

Citation

McGrath, M., Howard, D., & Baker, R. (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, 1-9. https://doi.org/10.1155/2015/383705

Journal Article Type Article
Acceptance Date Apr 7, 2015
Publication Date Jan 1, 2015
Deposit Date Jan 6, 2016
Publicly Available Date Apr 5, 2016
Journal Computational and Mathematical Methods in Medicine
Print ISSN 1748-670X
Publisher Hindawi
Volume 2015
Pages 1-9
DOI https://doi.org/10.1155/2015/383705
Publisher URL http://dx.doi.org/10.1155/2015/383705
Related Public URLs http://www.hindawi.com/journals/cmmm/2015/383705/

Files






You might also like



Downloadable Citations