FIGURE 2.

Each panel shows the axial view of the spatial distribution of the mean BOLD activation (μk) estimates, obtained for each brain state. Since the HMM was inferred at the population level, that is, concatenating the IC time courses of young and old participants, the μk values are group‐level estimates. Color bar values range from half of the maximum absolute mean value to the maximum absolute mean value, respectively for positive and negative μk values obtained in each state. ICs with mean activation values out of these bounds are not displayed. Negative values are displayed in blue‐scale, whereas positive values in red‐scale. The spatial distributions are overlaid to the MNI atlas, shown in gray scale. The labels S1, S2, and so forth refer to State 1, State 2, and so forth