![]() "Volunteers kept awake for 36 hours showed a tendency to use word repetitions and clichés they spoke monotonously, slowly, indistinctly," one study noted. Severe sleep deprivation seems to affect your ability to carry on a conversation - much like having way too much to drink. Source: Archives of Italian Biology, 2001 Seminars in Neurology, 2009 13. Otherwise, you enter "an unstable state that fluctuates within seconds and that cannot be characterized as either fully awake or asleep," and your ability to pay attention is variable at best. If you want to stay alert and attentive, sleep is a requirement. Having trouble paying attention to what you're reading or listening to? Struggling with anything that requires you to truly focus? "Attention tasks appear to be particularly sensitive to sleep loss," researchers have noted. Source: American Journal of Physiology, 2010 American Journal of Physiology, 2012 12. But when someone is sleep deprived, this normal slowdown doesn't happen, leading to what researchers call "excess nocturnal urine production." This condition may be linked to bed wetting in children and, in adults, it's tied to what's called nocturia - the need to use the bathroom many times during the night. This is why most people don't have to pee in the night as much as they do during the day. When people sleep, the body slows down its normal urine production. Source: The Journal of Neuroscience, 2011 Sleep, 2015 11. Other researchers have found that severe sleep deprivation impairs people's ability to follow pre-established procedures for making a "go" or "no-go" decision, something that researchers say contributed to the space shuttle Challenger explosion, the Chernobyl meltdown, and the Exxon Valdez disaster. "A single night of sleep deprivation evoked a strategy shift during risky decision making such that healthy human volunteers moved from defending against losses to seeking increased gains," researchers concluded. Planning to make some changes to your portfolio? You might want to make sure you're well-rested. Bad decision-making in ways that put lives and finances in danger The study found that the negative emotional effects of disruptive events - things like being interrupted while in the middle of doing something - were amplified by sleep loss.ġ0. They put those complaints to the test by following a group of sleep-deprived medical residents. "Complaints of irritability and volatility following sleepless nights" are common, a team of Israeli researchers observed. Source: Nature, 1999 Nature Neuroscience, 2000 Education Next, 2012 In another study, researchers found that while people tend to improve on a task when they do it more than once, this isn't true if they are kept awake after they try it the first time - even if they sleep again before doing it again. Sleep deprivation also wrecks adults' short-term memory, according to one study that found cutting sleep short significantly impaired the ability of adult volunteers to remember words they'd been shown the day before. One study of middle school kids found that "delaying school start times by one hour, from roughly 7:30 to 8:30, increases standardized test scores by at least 2 percentile points in math and 1 percentile point in reading." Sleep researchers say that teens, who naturally tend to become night owls, suffer even more from early start times.īut it's not just kids. Sleepiness has long been a problem for students. Account icon An icon in the shape of a person's head and shoulders.
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