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Comparing methods of estimating the total body centre of mass in three-dimensions in normal and pathological gait

Eames, M, Cosgrove, A and Baker, RJ 1999, 'Comparing methods of estimating the total body centre of mass in three-dimensions in normal and pathological gait' , Human Movement Science, 18 , pp. 637-646.

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Abstract

It is common clinical practice to estimate the position of the total body centre of mass (CM)as being a ®xed point in the centre of the pelvis (CP). Previous work has shown that there are significant differences between CP and the estimate of the position of CM from the second integral of ground reaction force data (GRF). In this study the CM was determined during an entire gait cycle in 11 able-bodied subjects (6 adults and 5 children) and 5 children with lumbosacral myelomeningocoele using both methods (GRF and CP). The CM was also estimated using a full body multi-segment kinematic model (KM). In agreement with previous work the excursion of CP showed signi®cant differences from that of GRF. CP always had a larger total excursion than GRF. KM however, showed no signi®cant differences from GRF in any of the three orthogonal directions in any group. These results show that the use of a full body kinematic model gives a better representation of the CM than does a ®xed point in the pelvis, especially in pathological gait patterns.

Item Type: Article
Themes: Health and Wellbeing
Schools: Colleges and Schools > College of Health & Social Care
Colleges and Schools > College of Health & Social Care > School of Health Sciences
Journal or Publication Title: Human Movement Science
Publisher: Elsevier
Refereed: Yes
ISSN: 0167-9457
Depositing User: RH Shuttleworth
Date Deposited: 07 Jul 2011 10:15
Last Modified: 20 Aug 2013 17:00
URI: http://usir.salford.ac.uk/id/eprint/16588

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