Fig. 2.

Effects of sensory impairment and cognitive dual tasking on postural sway [center-of-pressure (COP)] dynamics. Postural sway complexity (A), area (B), and speed (C) are shown during quiet-standing and dual-tasking conditions. Complexity index was greatest in controls and successively smaller in visual, somatosensory, and combined impairment groups. In general, somatosensory and/or combined impairment groups exhibited greater sway speed and area than visual impairment and control groups. Dual tasking reduced complexity yet increased postural sway speed and area. Dual tasking led to greater increases in sway speed within combined and somatosensory impairment groups than visual impairment and control groups. Values are group means ± SE.