Figure 1.
Experimental protocol and NIRS channel settings: (a) Experiment procedures; (b) Channel settings of NIRS with Source 1 and Detector 1 (S1–D1) forming channel 1 (Ch1 for deep layers) and Source 2 and Detector 1 (S2–D1) forming channel 2 (Ch2 for superficial layers); (c) A picture of the experimental setup with the blue box presenting the NIRS sensor.