1 Department of Mathematics, University of Pittsburgh, Pittsburgh, PA 15260, USA.
2 Department of Mathematics, University of Pittsburgh-Bradford Bradford, PA 16701, USA.
3 Department of Surgery Center for Inflammation and Regenerative Modeling McGowen Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15260, USA.
4 Department of Radiology and Neurology, University of Michigan, Ann-Arbor, MI 48105, USA.
Center of pressure electronic platform testing is proposed as an affordable early diagnostic tool for persons at risk of Parkinson's disease. A stiffness measures and crossing time statistic are studied for possible use in such a diagnosis.