Fig. 3
From: A method to quantify autonomic nervous system function in healthy, able-bodied individuals
Monitoring and calculating physiological signals. 15 s of raw signals from these sensors are shown in the upper panel, with six channels of the electrocardiogram, one channel of respiration, one channel of finger pressure, one channel of electrodermal activity, and two channels corresponding to the left and right pupil diameter. Calculated signals in the lower panel include heart rate from the electrocardiogram, heart rate variability (RMSSD) from interbeat intervals, and the mean arterial pressure