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Figure 1

From: Dietary flavanols improve cerebral cortical oxygenation and cognition in healthy adults

Figure 1

Haemodynamic responses in frontal cortical regions during hypercapnia (5% CO2) both before (0 h) and after (2 h) intake of either a low- or high-flavanol dietary intervention. Time course for Oxygenated (a) and Deoxygenated-haemoglobin (b) are presented as relative changes from baseline (room air) and averaged across participants (N = 17) and across frontal brain locations. The average relative concentrations of oxy- (c) and deoxy haemoglobin (d) during minutes 3–4 of the CO2 challenge (corresponding to maximal dilation) show that the high-flavanol intervention induces significantly higher oxygenation levels than the low-flavanol at 2 h post-intervention (*p = 0.030). No significant differences are observed for deoxygenated haemoglobin (Mean ± SEM).

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