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. Author manuscript; available in PMC: 2008 Oct 8.
Published in final edited form as: Neuroimage. 2007 Jan 18;35(1):396–405. doi: 10.1016/j.neuroimage.2006.11.051

Figure 1.

Figure 1

A schematic representing the removal of task periods from a mixed blocked/Event -related dataset. At the start of a BOLD run steady state was assumed after 4 frames (~ 10 s) and for each run these frames were removed on a voxel-wise basis. Two frames after the start of each task block (~ 5s) were included as resting state to account for the hemodynamic delay. At the end of each task block, 6 frames (~ 15s) were excluded from the resting state data, allowing for the hemodynamic response to return to baseline. These measures help minimize the effect of the task blocks on each resting epoch. This procedure provided 256 frames (~ 640 s) of “interleaved” resting state data for each subject.