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Fig. 1 | BMC Research Notes

Fig. 1

From: Caffeine differentially alters cortical hemodynamic activity during working memory: a near infrared spectroscopy study

Fig. 1

Effects of caffeine on left hemisphere cortical hemodynamics. The inset shows mean channel positions (averaged over subjects), visualized on the Montreal Neurological Institute (MNI) template brain. Black colored positions indicate the channels that were averaged to form the ROI. The left/right line graphs show time courses of relative concentrations of HbO/HbR in different experimental conditions. Vertical bars indicate the boundaries of time windows 1 and 2 (tw1 and tw2, respectively). The stimulation duration is indicated in the lower part of the graphs. The bar graphs above and below the line graphs depict mean individual maximum/minimum responses during the different time windows (see labels). The bar graphs depict mean HbO of the individual maximum response in tw1 (upper left graph), mean HbO of the individual minimum response in tw2 (lower left graph), mean HbR of the individual minimum response in tw1 (lower right graph), and mean HbR of the individual maximum response in tw2 (upper right graph)

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