Figure 2From: The extraction of the new components from electrogastrogram (EGG), using both adaptive filtering and electrocardiographic (ECG) derived respiration signalExamples of recorded signals (1 min). Normalized HSEGG signal after filtering with the fourth-order low pass Butterworth filter with a cutoff frequency of 35 Hz (top, black line). Normalized respiratory signal from thermistor after filtering with the fourth-order low pass Butterworth filter with a cutoff frequency of 0.5 Hz (bottom, blue line).Back to article page