Dynamics Study of Ankle Joint during Quiet Standing Balance Control with Emphasis on Dominant and Non-dominant Lower Limb

purpose: the present study aimed to evaluate the effect of dominant lower limb on the correlationbetween some of the dynamic variables of ankle joint and center of mass during quiet standingbalance control. methods: twelve healthy females with no known neurological or musculoskeletal disorders,with the mean age of 26±3.5 years, participated in this study. motion analysis system, forceplatform and visual3d software were utilized in order to measure and compute the researchvariables. the relationship between research variables was evaluated using pearson’s correlationcoefficient. t test and one-way anova were used to examine the effect of dominant leg on thecorrelations. results: findings indicated the correlation between ankle joint moment and center of massdisplacement (r=0.95) was higher than the correlation between ankle angular displacementand center of mass displacement (r=0.84). it seems that the leg factor (dominance and nondominance)does not influence the correlation of angular displacement of ankle joint and centerof mass displacement. however, it influenced the correlation between ankle joint moment andcenter of mass displacement. conclusion: therefore according to the present study it can be said that the kinetic variablesof ankle joints are more important than kinematic variables for the prediction of center of massdisplacement. in addition, it is suggested that in order to evaluate the lower extremity dynamics,during balance control, dominant and non-dominant lower limbs of the subjects be noticed too.