Fig. 6.

Grand-average hemodynamic responses in each channel to the functional activation task. Error bars represent the standard deviation across participants. Only the upper error bar for ${\mathrm{HbO}}_2$ and the lower error bar for HHb are reported for visualization purposes. $\mathrm{\Delta }[{\mathrm{HbO}}_2]$ is reported in red, $\mathrm{\Delta }[\mathrm{HHb}]$ in blue, and $\mathrm{\Delta }[\mathrm{oxCCO}]$ in green. These responses were obtained using the data from the whole broadband spectrum (740 to 900 nm) and the UCLn algorithm.