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. Author manuscript; available in PMC: 2011 Sep 1.
Published in final edited form as: Neuroimage. 2010 Feb 4;52(3):1135–1147. doi: 10.1016/j.neuroimage.2010.01.102

Figure 4.

Figure 4

Results of the proof-of-concept simulation of the CBF time series (solid curve) obtained from subtracting two time series slightly out of phase with each other. By keeping one time series (dashed curve) unchanged but decreasing the amplitude of the other time series (dotted curve), a range of CBF time series can be obtained with temporal characteristics similar to those published in the literature. Four examples are provided with the gain of the dotted time series set at (a) 0.53; (b), 0.42; (c) 0.32; and (d) 0.21 respectively. The gain of the dashed time series is unity. Black bars on the time axis indicate the duration of the stimulation (16s).