Lack of Sleep Makes Adolescents Stupider, Fatter and Gloomier.

Only 5% of high school seniors sleep 8 hours a night.  Half of adolescents get less than seven.

Snooze or Lose

Overstimulated, overscheduled kids are getting at least an hour’s less sleep than they need, a deficiency that, new research reveals, has the power to set their cognitive abilities back years.

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Using newly developed technological and statistical tools, sleep scientists have recently been able to isolate and measure the impact of this single lost hour. Because children’s brains are a work-in-progress until the age of 21, and because much of that work is done while a child is asleep, this lost hour appears to have an exponential impact on children that it simply doesn’t have on adults.
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Perhaps most fascinating, the emotional context of a memory affects where it gets processed. Negative stimuli get processed by the amygdala; positive or neutral memories get processed by the hippocampus. Sleep deprivation hits the hippocampus harder than the amygdala. The result is that sleep-deprived people fail to recall pleasant memories yet recall gloomy memories just fine.

It seems as though lack of sleep makes adolescents stupider,  fatter and gloomier.