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Comput Methods Biomech Biomed Engin. 2015;18(1):57-63. doi: 10.1080/10255842.2013.776549. Epub 2013 Mar 22.

A gait index may underestimate changes of gait: a comparison of the Movement Deviation Profile and the Gait Deviation Index.

Author information

1
a Research Institute for Sport and Exercise Sciences, Liverpool John Moores University , Liverpool, England , UK.

Abstract

The ability of the Movement Deviation Profile (MDP) and Gait Deviation Index (GDI) to detect gait changes was compared in a child with cerebral palsy who underwent game training. Conventional gait analysis showed that sagittal plane angles became mirrored about normality after training. Despite considerable gait changes, the GDI showed minimal change, while the MDP detected a difference equal to a shift between 10-9 on the Functional Assessment Questionnaire scale. Responses of the GDI and MDP were examined during a synthetic transition of the patient's curves from before intervention to a state mirrored about normality. The GDI showed a symmetric response on the two opposite sides of normality but the neural network based MDP gave an asymmetric response reflecting faithfully the unequal biomechanical consequences of joint angle changes. In conclusion, the MDP can detect altered gait even if the changes are missed by the GDI.

KEYWORDS:

GDI; MDP; artificial neural network; cerebral palsy; self-organising map; virtual rehabilitation

PMID:
23521124
DOI:
10.1080/10255842.2013.776549
[Indexed for MEDLINE]

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