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Change of R during day and as a function of time awake. (A) Modulation of R from all 70 nights of iEEG monitoring for the frequency bands 100–200 Hz and 200–400 Hz. (B) Increase of R as a function of time awake during a 40-h period of sustained wakefulness (sleep deprivation). The plots show the time courses of R in the additional frequency bands for which summary statistics and significance values are provided in Fig. 4 C and D. Straight line shows linear regression.
