title: Main functional roles of knee flexors/extensors in able-bodied gait using principal component analysis (I).
abstract: This study was undertaken to demonstrate how principal component analysis (PCA) can be used to detect the main functional structure of actions taken by knee flexors/extensors during able-bodied gait. PCA was applied as a classification and curve structure detection method for knee sagittal muscle moment developed during walking of 20 young, healthy male subjects. Over 90% of the information provided by the first three principal components (PCs) was chosen for further biomechanical interpretation. PCA was able to identify the three main functional contributions of knee sagittal muscle moment during able-bodied gait, namely control balance, foot clearance/limb preparation and shock absorption.
authors.affiliation: Research Centre, Sainte-Justine Hospital, 3175 Cote-Ste-Catherine, Quebec, H3T 1C5, Montreal, Canada. heidar.sadeghi@umontreal.ca
authors.forename: H
authors.initials: H
authors.lastname: Sadeghi
authors.forename: P
authors.initials: P
authors.lastname: Allard
authors.forename: F
authors.initials: F
authors.lastname: Barbier
authors.forename: S
authors.initials: S
authors.lastname: Sadeghi
authors.forename: S
authors.initials: S
authors.lastname: Hinse
authors.forename: R
authors.initials: R
authors.lastname: Perrault
authors.forename: H
authors.initials: H
authors.lastname: Labelle
mesh_terms: D000293:Adolescent; D000328:Adult; D005684:Gait / Q000502:physiology*; D006801:Humans; D007719:Knee Joint / Q000502:physiology*; D008297:Male; D018482:Muscle, Skeletal / Q000502:physiology*; D004856:Postural Balance / Q000502:physiology; D025341:Principal Component Analysis; D012016:Reference Values; D016474:Weight-Bearing / Q000502:physiology