Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4057945 | Gait & Posture | 2009 | 5 Pages |
Abstract
Two-dimensional magnitude squared coherence (2D-MSC) is developed to compare the two-valued time series which represent the center of pressure (COP) under each foot. A sinusoidal multiple taper spectral estimator is used to reduce bias and improve spectral resolution. The measure is applied to evaluate symmetry in the dual-plate postural steadiness time series obtained from healthy young and elderly volunteers, and patients with Huntington's Disease (HD), a group in which asymmetries in postural steadiness are anticipated. The results demonstrate that the 2D-MSC is a robust measure of inter-limb coordination that may be of value in studies of aging and neurologic disease.
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Authors
J.B. Myklebust, E.G. Lovett, B.M. Myklebust, N. Reynolds, L. Milkowski, T.E. Prieto,