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. Author manuscript; available in PMC: 2010 Apr 1.
Published in final edited form as: Neuroimage. 2008 Dec 25;45(2):410–419. doi: 10.1016/j.neuroimage.2008.12.014

Figure 7.

Figure 7

Grand average of the slow optical responses (hemodynamic) for the CW measurements at 4Hz (panel a) and at 7.5Hz (panel b), and for the FD measurements at 4Hz (panel c). The error bars are standard errors. Please note that the y axis for the FD measurements is different. In the CW measurements the amplitude decreases at 830 nm because of the increase in absorption at 830 nm (HbO increase), and the amplitude increases at 690 nm because of the decrease in absorption at 690 nm (HbR decrease). Also, the FD ac at 830 nm decreases, and phase increases due to the absorption increase at that wavelength.