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Psychology

How Sleep Deprivation Impairs Emotional Regulation and Increases Reactivity

Quick fact

After just one night of sleep deprivation, fMRI scans show amygdala reactivity to negative images can increase by more than 60% compared to normal sleep, while the connection to the prefrontal cortex weakens.

Why this is interesting

Ever snapped at a friend after a bad night's sleep? You're not just cranky—your brain's emotional brakes have loosened, and science shows exactly why.