Figure 4.

The sleep onset and duration of sleep stages were variable across participants and the passage of time alone does not account for the observed long‐range reactivation. (A) Duration of the wakefulness and sleep periods for each subject, during the MT task and post‐MT wakefulness and sleep. Participants performed the task in the MEG and they were invited to fall asleep. The post‐MT wakefulness includes the first 15 min after the beginning of the dim‐lit recordings while post‐MT sleep includes the first 15 min after the onset of NREM Stage 2. There was considerable variability in the beginning of the recording after the task and even more variability in sleep onset time. (B) The long‐range reactivation was state‐specific. The same statistical analysis on the 60–75 min time window [indicated by * in (A)], which is centered around the median sleep midpoint from the beginning of the task (68.3 min) and includes four participants who were awake and four who were asleep, does not show significant reactivation of long‐range connection in the delta band (number of sensor pairs: 32, P‐value = 0.18).