Research Article

EMG Muscle Activation Pattern of Four Lower Extremity Muscles during Stair Climbing, Motor Imagery, and Robot-Assisted Stepping: A Cross-Sectional Study in Healthy Individuals

Figure 1

Grand mean and SD of the time-normalized EMG activity. It contains the data of all 12 subjects for the different conditions and the four leg muscles of the dominant side; RF: m. rectus femoris, BF: m. biceps femoris, TA: m. tibialis anterior, and GM: m. gastrocnemius medialis. Cross-correlation coefficients and SD values for the comparison between stair climbing and Erigo EMG profiles as a measure of similarity regarding shape and timing (R = 0 no similarity and R = 1 perfect similarity).