Article

This study compared the gait of 10 subjects with unilateral anterior cruciate
ligament (ACL) reconstruction to a group of 12 height- and weight-matched control
subjects. The analysis was based on knee flexion, adduction, and internal
rotation angles and moments. The objective was to use principal component
analysis (PCA) to identify knees of the ACL reconstructed subjects that fell
outside normal ranges as determined by control subjects. Gait data were collected
on all subjects in a motion analysis laboratory. Principal component (PC) models
were developed for each gait measure based on the control subjects' data and used
to assess gait waveforms of ACL reconstructed subjects. PCA allows analysis of
entire gait waveforms for comparisons. In a sample of 10 ACL reconstructed
subjects (7 years after surgery, on average), six of the ACL reconstructed knees
had not returned to normal following surgery and eight of the contralateral knees
functioned differently from controls. A majority of the differences were noted to
occur in the abduction-adduction knee moment with corresponding infrequency in
the differences seen in abduction-adduction rotation. PCA enabled us to identify
subjects with abnormal gait waveforms as outliers relative to the normal control
group.
CI - Copyright (c) 2012 Elsevier B.V. All rights reserved.

Langue : ANGLAIS