Fig. 1: The fNIRS data acquisition.

fNIRS optode layout design is showed as above, optodes were placed using the 10–20 system to cover bilateral frontotemporal regions and centered on Cz (midline, middle point of D3), Purple circles (S1-S21) and blue circles (D1-D16) represent sources and detectors, respectively. Brown rectangles represent channels. Semi-transparent overlays denote the ROIs and the corresponding channels: green, Superior Temporal Gyrus (STG); red, Broca's area (BA); yellow, Wernicke's area (WA); pink, left Supplementary Motor Area (SMA).