FIGURE 1.

Upper row, from left to right: surgical field on the median aspect of the left severed arm and identification of median and ulnar nerves (left); higher magnification of the perineural (central up) and one of the intraneural electrodes (central down) implanted in the nerves, participant during a blinded manipulation training session learning to exploit the neural sensory feedback to control the robotic prostheses (right). Lower row, from left to right: the participant involved in a visuo-tactile integration (VTI) experimental session (left) and in a temporal order judgment (TOJ) experimental session with the arms crossed (right).