Figure 4
Experimental design and data recordings. (A) Sensor placement for a healthy representative subject of the sample population. SEMG active probes are placed over twelve muscles of the dominant (or more affected) lower limb and the trunk (bilaterally). Foot-switches are placed beneath the heel, the first, and the fifth metatarsal heads to detect gait phases. Electro-goniometers are placed on the lateral aspect of the knee joint, bilaterally. (B) Examples of sEMG (upper panel) and foot-floor contact (lower panel) signals acquired through the system STEP32 (Medical Technology, Turin, Italy). (C) Schematic representation of the walking path. Subject walked barefoot back and forth along a 9-m straight path, for approximately 5 min at a self-selected pace.
