Pictured: Figure 1 - “In vivo brain imaging shows that one night of total sleep deprivation reduces molecular clearance from the human brain”. Source: Eide PR, Vinje V, Pripp AH, Mardal KA, Ringstad G. Sleep deprivation impairs molecular clearance from the human brain, Brain 2021; 144(3), https://doi.org/10.1093/brain/awaa443