Fig. 6.

The autocorrelation of the mean spectral coherence between the insula and anterior cingulate in the gamma (A) and theta (B) bands, and the autocorrelation of the same coherence values when shifted relative to light (C & D). In (A) and (B) the autocorrelations at each lag are shown in red. In (C) and (D) these are shown in green. In all cases, the dotted lines indicate the extent of the 5th and 95th percentile of the distribution of autocorrelations produced from randomly resampling each dataseries 1000 times. In (C) and (D) the normal light cycle is represented by grey bars (lights off). The mean autocorrelation at each lag over these 1000 shuffles is shown as a green (A and B) or red (C and D) line.