PMID: 11334756May 4, 2001Paper

Principal component analysis of the power developed in the flexion/extension muscles of the hip in able-bodied gait

Medical Engineering & Physics
H SadeghiH Labelle

Abstract

This study was undertaken to demonstrate how principal component analysis (PCA) can be used: (a) to detect the main functional structure of actions taken by hip extensors and flexors during two consecutive gait cycles of able-bodied subjects, and (b) to determine whether or not symmetrical behaviour exists between right and left hip muscle power activity. Twenty young, healthy male subjects walked along a 13 m path at a freely-chosen speed. Applying curve structure detection methods such as PCA to walking patterns can provide insight into the functional tasks accomplished by the lower limbs of able-bodied and disabled subjects. PCA was applied as a classification and curve structure detection method to hip sagittal muscle power calculated for the right and left lower limbs. Over 70% of the information provided by the first four principal components (PCs) was chosen for further biomechanical interpretation. PC1 for both right and left sides mainly described the action taken by the hip extensors/flexors corresponding to the vertical component of ground force on the respective limbs during mid-stance. Propulsion and limb preparation were identified as the second and third tasks attributed to right hip muscle power, while between l...Continue Reading

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Citations

Apr 28, 2004·Clinical Biomechanics·Andreas DaffertshoferPeter J Beek
May 29, 2003·Gait & Posture·Heydar Sadeghi
Aug 21, 2013·Journal of Neuroengineering and Rehabilitation·Brian K HillenRanu Jung
Sep 26, 2002·Gait & Posture·Maureen TingleyW R Knight
Jun 12, 2003·IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·Heydar SadeghiHubert Labelle
Aug 1, 2006·Gait & Posture·Victoria L ChesterEdmund N Biden
Jan 25, 2006·Journal of Biomechanics·Luciano Santos Constantin RaptopoulosArmando Carlos de Pina Filho
Jun 12, 2010·Journal of Biomechanics·Elizabeth A CraneGeoffrey E Gerstner
May 9, 2015·IEEE Journal of Biomedical and Health Informatics·Zhe ZhangQiang Fang
May 17, 2013·Journal of Applied Biomechanics·Chia-Wei LinCheng-Feng Lin
Oct 19, 2007·Computer Methods in Biomechanics and Biomedical Engineering·Lianne JonesMalcolm J Beynon

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