Representative observation signals. A rest (white background) and a pinching (gray background) test trial are shown. The red vertical line at t=0 represents the stimulus onset when the subject started pinching isometrically, T
is the shift of 5 seconds that was applied for the extraction of observations. OM 1, O
: fNIRS observations of data from M1 and PMv, respectively. O
: observations of breathing and heart rate, respectively. O
: observation of skin conductance response. O
: observation of blood pressure signal. Note that all observations are unit-less due to the normalization steps in the pre-processing.