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

Gabor J. Barton, Malcolm B. Hawken, Gill Holmes, Michael H. Schwartz

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)57-63
Number of pages7
JournalComputer methods in biomechanics and biomedical engineering
Volume18
Issue number1
DOIs
StatePublished - Jan 25 2015

Bibliographical note

Funding Information:
This project was funded by The WellChild Trust and Alder Hey Children’s NHS Foundation Trust.

Publisher Copyright:
© 2013, © 2013 Taylor & Francis.

Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.

Keywords

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

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