Reconfiguration of correlation structure over time.

(a) Analysis pipeline for comparing correlation structure. For any two correlation matrices, W_u and W_v, whose elements have been z-scored against those obtained under a “jittered” null model in which random offsets were added to timeseries (see Methods), we vectorize the upper triangular elements and compute their similarity using a Pearson correlation coefficient. We compare the observed correlation coefficient against that which we would expect under a null model in which rows and columns of W_u are permuted uniformly at random. In panels (b), (c), (d), and (e), we show the scatterplots of standardized similarity scores for pairs of correlation matrices with the number of days separating their respective recording sessions. In panels (f), (g), (h), and (i), each point represents the standardized similarity scores of module co-assignment matrices across pairs of recording sessions.