Motor control

Document Type



The purpose of this study was to examine the center of pressure response to visual perturbations presented in virtual reality (VR). The visual perturbations were an anterior or posterior displacement that varied in velocity (1m/s, 3m/s & 5m/s) and duration (0.6s, 1s and 2 s). The center of pressure distance travelled was measured in the anterior-posterior direction while subjects balance on one foot. Four subjects were evaluated in the pilot. A t-test was used to examine the pooled effect of the perturbations. The visual perturbation significantly increased the distance the center of pressure travelled (p = 0.041). A 2-way repeated measures ANOVA was used to assess the specific affects velocity and duration. The main effect for duration was significant (p =0.014). Duration of the visual perturbation appears to be the most important component to challenge postural control.

New Investigator Award