Figure 6
A generic healthy foot is outlined in grey. Shaded red areas indicate regions that were reported more than the baseline condition, and shaded blue regions represent a decrease in reporting compared to baseline. The † symbol indicates significant changes in percept reporting frequency and/or percept size over the entire plantar surface of the foot (two-tailed paired t-tests, p < 0.05). We re-tested contacts F1, F2, R2, and R3 in two supplemental conditions. When testing contacts F1 and F2, the eyes were open in all three conditions shown here. For contacts R2 and R3, the eyes were closed. (a) During the “prosthesis off” condition, electrical stimulation was delivered while a participant stood upright without wearing a prosthesis. (b) During the “prosthesis unloaded” condition, electrical stimulation was delivered while a participant stood on a wooden box with the intact leg and let the prosthetic leg dangle in the air. (c) Electrical stimulation was delivered while participants stood upright with their prostheses loaded. These results are also shown in Fig. 5, but repeated here to easily identify perceptual differences between standing conditions.
