Science2000sglobalhigh confidence

In the same Nature verbal-learning study, activity in the left temporal lobe, a classic language-processing area, decreased after sleep deprivation, even though better performance was associated with increased parietal-lobe activity.

Notes on verification

Directly confirmed by primary Nature study (Drummond et al., 2000) abstract and corroborated by an independent secondary review (Frontiers in Neurology/PMC).

Sources