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. 2016 Jan 11;6:416. doi: 10.3389/fphys.2015.00416

Figure 2.

Figure 2

Channel configuration of the 4 × 4 optode probe set. The 24-channel NIRS probe set was positioned over the motor areas. Red and blue circles indicate the positions of NIRS sensors and detectors, respectively. The black numbers represent the channels, and the colored boxes show the regions of interest (PFC, prefrontal cortex; pre-SMA, pre-supplemental motor area; SMA, supplemental motor area; PMA, pre-motor area; SMC, somatosensory motor cortex). According to the international 10–20 placement system, Cz was used as a marker position to ensure replicable placement of the optodes.