alexa Quantification of postural sway patterns in tardive dyskinesia.
Physicaltherapy & Rehabilitation

Physicaltherapy & Rehabilitation

Journal of Sports Medicine & Doping Studies

Author(s): van Emmerik RE, Sprague RL, Newell KM

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Abstract 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. This article was published in Mov Disord and referenced in Journal of Sports Medicine & Doping Studies

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