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. Author manuscript; available in PMC: 2020 Jun 1.
Published in final edited form as: Environ Res. 2019 Apr 6;173:539–548. doi: 10.1016/j.envres.2019.04.006

Fig. 1.

Fig. 1.

The functional near-infrared spectroscopy (fNIRS) optode configuration over the dorsolateral prefrontal cortex used in our study. Using the international 10/20 system, we configured eight sources (solid red circles) and eight detectors (checkered blue circles) to make 18 unique channels (bold black lines), creating eight regions of interest (ROIs)—four in the left hemisphere (L1–L4) and four in the right hemisphere (R1–R4). (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)