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Sagittal (x = 0), coronal (y = −24), and transverse (z = −12) sections of brain areas with significantly decreased absolute rCBF during deep NREM sleep when compared with that during light NREM sleep. Details are the same as in Figure 1. The absolute rCBF in the pons, midbrain, cerebellar vermis, caudate nucleus, and the thalamus decreased during deep NREM sleep in comparison to that during light NREM sleep.
