Difference in signal separation under three different

<p><b>conditions.</b> Values of : −0.4 (left column), −0.6 (middle column), and −0.8 (right column) were used for the data at a source-detector distance of 30 mm during the finger-tapping task for participant 1. Upper two rows: hemodynamics estimated by the conventional method. Middle two rows: functional component by the proposed method. Bottom two rows: systemic component by the proposed method. Data were block averaged. Red and blue lines indicate oxy- and deoxyhemoglobin changes, respectively. Red and blue bands indicate SDs for oxy- and deoxyhemoglobin changes, respectively. Green line indicates the task period. “Left” and “Right” indicate the measurement positions. “L” (left) and “R” (right) indicate the side used during finger tapping.