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Quantification of postural sway patterns in tardive dyskinesia
Author(s) -
van Emmerik R. E. A.,
Sprague R. L.,
Newell K. M.
Publication year - 1993
Publication title -
movement disorders
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.352
H-Index - 198
eISSN - 1531-8257
pISSN - 0885-3185
DOI - 10.1002/mds.870080309
Subject(s) - center of pressure (fluid mechanics) , tardive dyskinesia , orientation (vector space) , psychology , quiet , dyskinesia , physical medicine and rehabilitation , force platform , developmental psychology , audiology , medicine , parkinson's disease , schizophrenia (object oriented programming) , psychiatry , geometry , mathematics , physics , disease , pathology , quantum mechanics , engineering , aerodynamics , aerospace engineering
An assessment was made of the orientation and variability in postural center of pressure patterns in individuals with tardive dyskinesia (TD) and/or developmental disability during quiet standing. Postural patterns were compared and contrasted between four groups of individuals: those with (a) TD and developmentally disabled (severely and profoundly retarded); (b) developmental disability only; (c) TD but of normal intelligence; and (d) a healthy control group. The center of pressure displacements were derived from the lateral, vertical, and anterior‐posterior force and moment components of force platform measurements. Analyses demonstrated that individuals with TD in combination with developmental disability had a different center of pressure orientation and variability compared to healthy individuals and individuals suffering only from developmental disability or TD. The center of pressure pattern in the developmentally disabled TD group was characterized by a more prominent lateral orientation, whereas in the other three groups, it had a more predominant anterior‐posterior orientation. In addition, the variability in these orientation components was much smaller in the developmentally disabled TD group, indicating a more regular pattern of sway in the center of pressure during quiet standing in these individuals. These findings show that assessments of postural center of pressure profile orientation and variability may be useful indicators for investigating TD, especially in distinguishing between developmental disability and TD.