FIGURE2 Network morphology and activity images at different days post induction. (A) Fluorescence microscopy images from whole networks were prepared by stitching 40 images at each time point. Magnified view of network morphology on 22, 28, and 63 dpi are illustrated in Supplementary Figure 1 . Scale bar is 500 µ m. (B) Neuronal movement trajectories were extracted from morphology image sequences at different weeks. A magnified view of the trajectories is shown in Supplementary Figure 2 . Scale bar is 500 µ m. (C) Network activity image