Group ICA of spontaneous fMRI activity patterns in 25 fetuses (24 to 28 weeks of gestation). Sample axial, sagittal, and coronal slices corresponding to bilaterally represented independent components from ICA are overlaid onto the template of a 32-week fetal brain. The left side of the figure corresponds to the left side of the brain. Coordinates identifying slice locations are provided below each slice using the MNI coordinate space. ICA was used to derive a total of 14 maximally statistically independent brain networks, 8 of which were bilaterally distributed. (A to H) The following networks were detected: (A) motor association (MA) cortex; (B) peristriate (PS) cortex; (C) primary visual (V1) and visual association (VA) cortex; (D) inferior parietal lobule (IPL), primary motor (M1), and motor association cortex; (E) right frontal cortex; (F) left frontal cortex; (G) left primary motor cortex; and (H) right primary motor cortex and bilateral temporal lobe (TL).