Figure 3From: Evaluation of methods for extraction of the volitional EMG in dynamic hybrid muscle activationA Processing scheme of the EMG signal. The grey blocks designate "Rigid" processing modules and their inclusion was mandatory in the scheme. The white blocks designate "Flexible" processing modules whose inclusions in the scheme are optional, and they were inserted into and out of the process in various combinations. * Butterworth, 4th order, with cut-offfrequency of 15 Hz. ** Butterworth, 4th order, with cut-off frequency of 5 Hz.Back to article page