Knee motion variability in patients with knee osteoarthritis: The effect of self-reported instability

Clinical Biomechanics
Jonathan A GustafsonShawn Farrokhi

Abstract

Knee osteoarthritis has been previously associated with a stereotypical knee-stiffening gait pattern and reduced knee joint motion variability due to increased antagonist muscle co-contractions and smaller utilized arc of motion during gait. However, episodic self-reported instability may be a sign of excessive motion variability for a large subgroup of patients with knee osteoarthritis. The objective of this work was to evaluate the differences in knee joint motion variability during gait in patients with knee osteoarthritis with and without self-reported instability compared to a control group of older adults with asymptomatic knees. Forty-three subjects, 8 with knee osteoarthritis but no reports of instability (stable), 11 with knee osteoarthritis and self-reported instability (unstable), and 24 without knee osteoarthritis or instability (control) underwent Dynamic Stereo X-ray analysis during a decline gait task on a treadmill. Knee motion variability was assessed using parametric phase plots during the loading response phase of decline gait. The stable group demonstrated decreased sagittal-plane motion variability compared to the control group (p=0.04), while the unstable group demonstrated increased sagittal-plane motion ...Continue Reading

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Citations

Jun 29, 2018·Current Rheumatology Reviews·Y V Raghava Neelapala
Apr 18, 2019·EFORT Open Reviews·David T WallaceFrédéric Picard
Dec 23, 2016·Frontiers in Human Neuroscience·John M BardenOlivier Beauchet

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