(A) Distribution of FIM elements, for all epochs, all neuronal ensembles, and all rats. (B) Eigenvalues of the FIM, average across epochs and neuronal ensembles, for an example rat (# 1). Shaded areas represent SEM. Stiff and sloppy dimensions correspond to FIM eigenvectors of lowest and highest ranks, respectively. (C) Projection of into the first three eigenvectors of the FIM from a given epoch , for all . Data from one neuronal ensemble from rat 1. (D) Projection of into the first and the 20th eigenvectors of the FIM from epoch , noted and , respectively, for all . Top inset: distribution of projections into . Right inset: distribution of projections into . Note higher variance of projections into than into . Data from one neuronal ensemble from rat 1. (E) Average variance of projections of into the different eigenvectors of the FIM at epoch (for all ), for the different rats. Traces represent average over neuronal ensembles and shaded areas represent SEM.