Fig. 2.

tfMRI temporal segments extraction. (a): The cortical surface and whole-brain tfMRI signal matrix Xⁱ of subject i. The tfMRI signal of an example grayordinate is shown and highlighted by the blue frame. (b): Examples of extracted two consecutive temporal segments within time windows w_j and w_j+1 (highlighted by yellow and blue frames, respectively). The first one starts at time point t_j and the second one starts at time point t_j+1. (c): Example of tfMRI emotion task paradigm. The blocks of the two task designs are interleaved during the entire fMRI scan time t. Window length l is smaller than the length of any of the blocks of the two task designs.