Correlation between sway parameters of center of pressure in quiet standing with eyes open and eyes closed, functional balance tests and symmetry index in chronic hemiparesis patients

Proprioceptive problems، visuospatial deficits and muscle weakness are the main causes of weight bearing asymmetry and postural control impairment in chronic hemiparesis patients. The aim of this study was to investigate the correlation between center of pressure parameters in quiet standing with eyes open and closed and functional balance tests and symmetry index in these patients.

In this correlation study، 16 stroke patients (mean age: 52. 937±10. 109 years)، were selected by simple non-probability sapling. Force plate، Functional Reach and Timed Up and Go tests and scales were used in order to investigate postural sway parameters in quiet standing، functional balance and symmetry index، respectively.

Moderate to high significant correlation was obtained between Timed Up and Go test and symmetry index and most of the postural sway parameters in eyes closed condition، while Functional Reach test had only moderate significant correlation with standard deviation of velocity (anterior-posterior) and phase plane total. Also symmetry index showed moderate correlation with most of the postural sway parameters.

Current study demonstrates the role of vision and task in correlation between center of pressure parameters، balance tests and symmetry index.