Fig. 4From: Novel capsaicin-induced parameters of microcirculation in migraine patients revealed by imaging photoplethysmographyThe time course of blood perfusion changes during capsaicin application: an example of BPA evolution in four big ROIs representative for migraine patients (a), and an example for healthy subjects (b). Vertical dashed lines indicate the moments when the blood perfusion starts to grow (dashed green line) and when it was saturated (dashed red line)Back to article page