Figure 2
From: Effects of the type and direction of support surface perturbation on postural responses
Group means and standard deviation of the EMG data. Group means and standard deviation of the EMG onset latency (left) and magnitude (right) for the extensor (top) and flexor (bottom) muscles for four types of perturbation. A significant difference between translation and rotation is indicated by*, a significant difference between forward/toe up and backward/toe down is indicated by†, and a significant interaction is indicated by‡.