Fig. 5

Parameters of capsaicin-induced blood perfusion in control and migraine groups. a Coefficient of variation and b delay time of capsaicin reaction in migraine patients and control group. Data presented as the mean (small squares), error of mean (boxes), and SD (whiskers). c Two-dimensional distribution for CV and DT in the Control and Migraine groups. Red circles are for migraine patients, and blue squares are for healthy subjects. The dashed red line shows the region of the predominant distribution of the parameters for migraine group, whereas the dashed blue line is for the control group