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. 2016 Oct 5;7(11):4424–4440. doi: 10.1364/BOE.7.004424

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Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

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Fig. 6 — Grand average changes in systemic variables (mean ± standard error) during frontal lobe functional activation induced by Stroop task. (a) Change in mean blood pressure (mmHg). (b) Change in heart rate (bpm). (c) Change in end tidal carbon dioxide (kPa). (d) Change in scalp blood flow in arbitrary Perfusion Unit. The shaded areas indicate the 60 s stimulation period.