Fig. 4.

Examples of reconstructed $\mathrm{\Delta }[{\mathrm{HbO}}_2]$ (first row), $\mathrm{\Delta }[\mathrm{HHb}]$ (second row), and $\mathrm{\Delta }[\mathrm{oxCCO}]$ (third row) images on the GM surface mesh at five different time points for participant 1. The selected time points are 2, 10, 20, 30, and 40 s after stimulus presentation. Images were mapped to the MNI152 GM mesh for visualization purposes.