Fig. 1.

Total Activation and iCAP frameworks. (a) TA, here illustrated for a selected voxel in PCC for one subject, reveals block-like activity inducing signals (in blue) by denoising (activity-related signal in red) and deconvolving the BOLD signal (gray). The innovation signals (in green) are the derivatives of activity-inducing signals, and indicate the onset and offset timing of the events. The activation maps on the right correspond to the activation maps of each type of signal at a selected time frame (in purple shadow). (b) iCAPs are recovered by temporal clustering of innovation signals, and reveals spatially overlapping activation patterns with common onset timing. Backprojection of the spatial maps onto the activity-inducing signal results in highly overlapping temporal dynamics of iCAPs.