Sleep Deprivation

Brain imaging has shown sleep loss disconnects the emotional control hub of the brain, the amygdala, from the prefrontal cortex, the portion of the brain that regulates the amygdala. Without oversight from the prefrontal cortex, amygdala activity levels in response to perceived negative images were as much as 60 percent higher than levels in a rested brain. As they grow older, sleep is even more critical. By 20 hours without sleep, the brain’s reaction time is similar to that of a person with a blood alcohol level of 0.08. Sleep deprivation for 24 hours results in significant brain changes in areas responsible for judgment, impulse control, attention, and visual association, and yet the human beings--who are sleep deprived--still think they are functioning just fine.

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