Fig. 3.

Statistical assessment of the temporal evolution of the cortical sources of delta activity (0.5–5 Hz). Left: baseline, right: recovery sleep. Yellow areas represent voxels that showed higher delta activity after SO (t-values at P<0.05). Minutes 0–2 (1 min), 4–6 (5 min) and 8–10 (9 min) were compared to the two min prior to SO (-2 to 0 min). Coordinates of the planes are as in Fig. 2 (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article).