## 2 Materials and Methods
### 2.5 INIRS Data Collection
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Channel**} & \multirow{2}{*}{**SD Pair**} & \multirow{2}{*}{**Pair on**} & \multirow{2}{*}{**MNI Coordinates**} & \multirow{2}{*}{_x,y,z_} & \multirow{2}{*}{**SD Distance**} & \multirow{2}{*}{**Brodmann**} & \multirow{2}{*}{**Region**} & \multirow{2}{*}{**Specificity**} \\  & & & & & & **(mm)** & & **Number** & \\ \hline \multirow{2}{*}{1} & \multirow{2}{*}{S1-D1} & \multirow{2}{*}{AF7-F5} & \multirow{2}{*}{\(-\)59.589} & \multirow{2}{*}{60.168} & \multirow{2}{*}{\(-\)4.362} & \multirow{2}{*}{36} & \multirow{2}{*}{45} & \multirow{2}{*}{Pars triangularis Broca’s} & \multirow{2}{*}{48.79} \\ \cline{6-6}  & & & & & & & 46 & Dorsolateral prefrontal cortex & 43.20 \\ \hline \multirow{2}{*}{3} & \multirow{2}{*}{S2-D1} & \multirow{2}{*}{AF3-F5} & \multirow{2}{*}{\(-\)52.105} & \multirow{2}{*}{65.735} & \multirow{2}{*}{13.046} & \multirow{2}{*}{41.9} & \multirow{2}{*}{45} & \multirow{2}{*}{Pars triangularis Broca’s} & \multirow{2}{*}{43.88} \\ \cline{6-6}  & & & & & & 46 & Dorsolateral prefrontal cortex & 32.12 \\ \hline \multirow{2}{*}{4} & \multirow{2}{*}{S2-D3} & \multirow{2}{*}{AF3-Afz} & \multirow{2}{*}{\(-\)18.354} & \multirow{2}{*}{83.517} & \multirow{2}{*}{24.189} & \multirow{2}{*}{39.1} & \multirow{2}{*}{10} & \multirow{2}{*}{Frontopolar area} & \multirow{2}{*}{72.47} \\ \cline{6-6}  & & & & & & & 46 & Dorsolateral prefrontal cortex & 70.67 \\ \hline \multirow{2}{*}{5} & \multirow{2}{*}{S3-D1} & \multirow{2}{*}{F3-F5} & \multirow{2}{*}{\(-\)58.802} & \multirow{2}{*}{54.143} & \multirow{2}{*}{23.513} & \multirow{2}{*}{30.6} & \multirow{2}{*}{45} & \multirow{2}{*}{Pars triangularis Broca’s} & \multirow{2}{*}{70.67} \\ \cline{6-6}  & & & & & & & 46 & Dorsolateral prefrontal cortex & 66.61 \\ \hline \multirow{2}{*}{6} & \multirow{2}{*}{S3-D2} & \multirow{2}{*}{F3-F1} & \multirow{2}{*}{\(-\)41.387} & \multirow{2}{*}{58.42} & \multirow{2}{*}{48.855} & \multirow{2}{*}{30.5} & \multirow{2}{*}{9} & \multirow{2}{*}{ Dorsolateral prefrontal cortex} & \multirow{2}{*}{63.16} \\ \cline{6-6}  & & & & & & & & & \\ \hline \multirow{2}{*}{8} & \multirow{2}{*}{S4-D2} & \multirow{2}{*}{Fz-F1} & \multirow{2}{*}{\(-\)15.837} & \multirow{2}{*}{63.087} & \multirow{2}{*}{62.131} & \multirow{2}{*}{30.4} & \multirow{2}{*}{8} & \multirow{2}{*}{Frontal eye fields} & \multirow{2}{*}{34.73} \\ \cline{6-6}  & & & & & & & & & \\ \hline \multirow{2}{*}{9} & \multirow{2}{*}{S4-D3} & \multirow{2}{*}{Fz-Afz} & \multirow{2}{*}{0.193} & \multirow{2}{*}{75.25} & \multirow{2}{*}{49.43} & \multirow{2}{*}{39.8} & \multirow{2}{*}{9} & \multirow{2}{*}{ Dorsolateral prefrontal cortex} & \multirow{2}{*}{61.77} \\ \cline{6-6}  & & & & & & & & & Dorsolateral prefrontal cortex & 68.93 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: The detailed montage for the study (short-distance separation channels are not included). Specificity ratings > 30% for each anatomical area as it relates to each source-detector (SD) position were taken from the fOLD toolbox [59], using the Brodmann atlas. Figure 2: fNIRS montage. (**a**) A two-dimensional picture to indicate sources (red dots), detectors (blue dots), short-distance separation channels (red dots with blue circles), and regular channels (purple lines) in 10–10 system. (**b**) Two three-dimensional pictures as an example for the sources, detectors, and channel positions on the brain cortex.