Fig. 1. Diagram of the experimental arrangement. R = recording electrodes at the fourth to fifth dorsal (DRL4–DRL5) and ventral lumbar (VRL4–VRL5) spinal root fascicles and filaments. Arrow indicates the location of percutaneous injection at “sciatic notch” area. Stimulating electrodes on sciatic nerve, tibial (Tib), sural (Sur), and common peroneal (Per) nerves. Spinal roots are transected between recording sites and their entry to the spinal cord.