(A) Bar plots of the ratio between the mean signal intensity and signal standard deviation across voxels. The SNR across voxels was higher in the pmEC than the alEC (T(21) = 15.2721, p < 0.001). This was associated with a larger signal in the pmEC (mean signal alEC = 4.97; mean signal pmEC = 7.76; T(21) = 38, p < 0.001) in the absence of differences in spatial standard deviation (T(21) = 1.5, p = 0.144). Note, that mean signal was subtracted from time-series prior to all connectivity analyses (see ‘Materials and methods’), which makes it unlikely that signal intensity differences affected the connectivity results. (B) Bar plots of the ratio between the mean signal intensity and the signal standard deviation across time. Temporal SNR (tSNR) did not differ between alEC and pmEC (T(21) = 0.2, p = 0.83). Error bars show S.E.M. over participants.