fig3

Figure 3. Left: the NIRS apparatus; Middle: the data-capturing device; Right: NIRS cap (NIRx NIRSPort2 Wireless system) containing sources (red marks) and detectors (blue marks) are placed on the participants’ head (A); light enters the tissue from location of source and backscattered photons are detected at the detector site (B). The detected light intensity carries information about changes in oxy-hemoglobin and deoxy-hemoglobin. NIRS: near infrared spectroscopy