Table 1.

Correlation coefficients between NIRS channel pairs and between NIRS channel and laser Doppler signals (Doppler).

	Ch1	Ch2	Ch3	Ch4	Ch5
Ch2	0.998
Ch3	0.996	0.996
Ch4	0.996	0.997	0.998
Ch5	0.994	0.996	0.995	0.997
Doppler	0.922	0.932	0.928	0.933	0.937

Note that fNIRS signals (Ch1–5) were highly correlated with laser Doppler signal.