Figure 3
From: Lower peripheral circulation in eumenorrheic young women with premenstrual symptoms
Physiological features of oxyhemoglobin (HbO2) and deoxyhemoglobin (Hb) represented by a thick red line and a dotted blue line, respectively, in light absorption. h1 and h2 represent the degree of light absorption of HbO2 and Hb at the wavelengths of 805 and 660 nm, respectively, in the near-infrared region.