Common modular architecture across diverse cortical areas in early development.

When examined across areas, we found that activity in all cortical regions exhibited highly significant modularity vs. surrogate controls drawn from frames without spontaneous events (25 of 25 FOVs significant vs. surrogate at P < 0.01, bootstrap test), that did not differ significantly across areas ( Fig. 1 E , (mean ± SEM) PFC: 0.10 ± 0.01 (n = 1,252 events from 6 animals, see SI Appendix , Table S1 ); PPC: 0.10 ± 0.01 (n = 1,228 events, 5 animals); A1: 0.10 ± 0.01 (n = 1,931 events, 4 animals); S1: 0.10 ± 0.01(n = 1,092 events, 5 animals); V1: 0.11 ± 0.01 (n = 1,971 events, 5 animals); Kruskal–Wallis (KW) test H(4) = 0.24, P = 0.993).

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