Figure 5. (a) Two-arm upper-limb loading, (b) center of mass (COM)acceleration feedback, and (c) muscle-induced joint moments tostabilize against perturbation pulse (15% body weight, 250 ms)applied at model COM in either forward or side (i.e., right) direction. Add = adduction, Ank = ankle, BW = body weight, Dorsiflex = dorsiflexion, Flex = flexion, L = left, R = right-side.
Geng B, Yoshida K, Petrini L, Jensen W. Evaluation of sensation evoked by electrocutaneous stimulation on forearm in nondisabled subjects. J Rehabil Res Dev. 2012; 49(2):297–308.