Cross-talk correction method for knee kinematics in gait analysis using principal component analysis (PCA): a new proposal

In 3D gait analysis, the knee joint is usually described by the Eulerian way. It consists in breaking down the motion between the articulating bones of the knee into three rotations around three axes: flexion/extension, abduction/adduction and internal/external rotation. However, the definition of t...

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Bibliographic Details
Published in:PloS one 2014-07, Vol.9 (7), p.e102098-e102098
Main Authors: Baudet, Audrey, Morisset, Claire, d'Athis, Philippe, Maillefert, Jean-Francis, Casillas, Jean-Marie, Ornetti, Paul, Laroche, Davy
Format: Article
Language:English
Subjects:
Aged
Analysis
Arthritis
Axes (reference lines)
Axes of rotation
Biocompatibility
Biology and Life Sciences
Biomechanical Phenomena
Biomedical materials
Bones
Breaking down
Case-Control Studies
Cognitive science
Crosstalk
Data collection
Data Interpretation, Statistical
Deformation
Deformation effects
Evaluation
Gait
Humans
Kinematics
Knee
Knee Joint - physiopathology
Medicine and Health Sciences
Methods
Middle Aged
Osteoarthritis
Osteoarthritis, Knee - physiopathology
Patients
Posture
Principal Component Analysis
Principal components analysis
Research and Analysis Methods
Rheumatology
Standardization
Variance
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Summary:In 3D gait analysis, the knee joint is usually described by the Eulerian way. It consists in breaking down the motion between the articulating bones of the knee into three rotations around three axes: flexion/extension, abduction/adduction and internal/external rotation. However, the definition of these axes is prone to error, such as the "cross-talk" effect, due to difficult positioning of anatomical landmarks. This paper proposes a correction method, principal component analysis (PCA), based on an objective kinematic criterion for standardization, in order to improve knee joint kinematic analysis. The method was applied to the 3D gait data of two different groups (twenty healthy subjects and four with knee osteoarthritis). Then, this method was evaluated with respect to three main criteria: (1) the deletion of knee joint angle cross-talk (2) the reduction of variance in the varus/valgus kinematic profile (3) the posture trial varus/valgus deformation matching the X-ray value for patients with knee osteoarthritis. The effect of the correction method was tested statistically on variabilities and cross-talk during gait. Cross-talk was lower (p
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0102098