title: Three-dimensional clinical measurement of bilateral hip and knee rotations.
abstract: This paper reports a technique of using an electromagnetic system to measure three-dimensional bilateral hip and knee joint rotations during walking and of using peak cross-correlation between rotation angles to describe the pattern of rotations. Three-dimensional rotations of thigh and shank during gait were recorded using five receivers of the electromagnetic system synchronised with four foot-switches. Thirteen normal subjects were tested on two separate occasions to examine repeatability of the measurements. The relationship between the rotations was represented as lags at peak cross-correlation. Twelve parameters of the lags at peak cross-correlation were calculated. The analysis showed that the joint rotation could be measured reliably and the cross-correlation analysis provided parameters that were generally suitable for defining characteristics of hip and knee joint rotations during gait.
authors.affiliation: School of Mechanical, Manufacturing and Medical Engineering Queensland University of Technology, Brisbane, Australia. m.pearcy@qut.edu.au
authors.forename: M J
authors.initials: MJ
authors.lastname: Pearcy
authors.forename: P L
authors.initials: PL
authors.lastname: Cheng
mesh_terms: D001696:Biomechanical Phenomena; D001698:Biomedical Engineering; D055590:Electromagnetic Phenomena; D005684:Gait / Q000502:physiology; D006621:Hip Joint / Q000502:physiology*; D006801:Humans; D007719:Knee Joint / Q000502:physiology*; D012399:Rotation; D016138:Walking / Q000502:physiology