For seeded source-level PLV analysis, PLVs were averaged across all considered seed voxels within each condition. We statistically compared the memory against control blocks by computing two-tailed, paired sample t-tests in each voxel and used cluster permutations statistics with the spatial cluster dimension to control for multiple comparisons (uncorrected cluster α = 0.01). Of note, we obtained similar results when employing another common neural connectivity measure called the imaginary part of coherency, which is a calculation confined to non-instantaneous correlations (i.e., correlations exclusively with non-zero phase lag), and thus insensitive to false connectivity arising from volume conduction 94.
