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Published in: Experimental Brain Research 3/2006

01-01-2006 | Research Article

Deterministic center of pressure patterns characterize postural instability in Parkinson’s disease

Authors: Jennifer M. Schmit, Michael A. Riley, Arif Dalvi, Alok Sahay, Paula K. Shear, Kevin D. Shockley, Raymund Y. K. Pun

Published in: Experimental Brain Research | Issue 3/2006

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Abstract

Static posturographic recordings were obtained from six Parkinson’s patients and six age-matched, healthy control participants. The availability of vision and visuo-spatial cognitive load were manipulated. Postural sway patterns were analyzed using recurrence quantification analysis (RQA), which revealed differences in center of pressure (COP) dynamics between Parkinson’s and control participants. AP COP trajectories for the Parkinson’s group were not only significantly more variable than for the control group, but also exhibited distinct patterns of temporal dynamics. The visual manipulation did not differentially affect the two groups. No cognitive load effects were found. The results are generally consistent with the hypothesis that pathological physiological systems exhibit a tendency for less flexible, more deterministic dynamic patterns.
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Metadata
Title
Deterministic center of pressure patterns characterize postural instability in Parkinson’s disease
Authors
Jennifer M. Schmit
Michael A. Riley
Arif Dalvi
Alok Sahay
Paula K. Shear
Kevin D. Shockley
Raymund Y. K. Pun
Publication date
01-01-2006
Publisher
Springer-Verlag
Published in
Experimental Brain Research / Issue 3/2006
Print ISSN: 0014-4819
Electronic ISSN: 1432-1106
DOI
https://doi.org/10.1007/s00221-005-0094-y

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