Sleep disorders Processing the Environment MCAT Khan Academy
Voiceover: I'm sure we'veall had trouble sleeping at one point or another, maybe trouble falling asleep,staying asleep or waking up or maybe you're forcingyourself to sleep less because you have toomuch to do to lie in bed. But sleep deprivationcan be a serious issue. People who don't get enoughsleep are more irritable and perform worse onmemory and detention tasks
than people who do. So all this can be just a minorannoyance in everyday life, imagine the longtermimplications for let's say, airline pilots, firefighters,security officers or the person driving nextto you on the freeway. For example, one studyin Canada showed that the Monday after the Spring time change, so when people lose an hour of sleep,
the number of trafficaccidents increases sharply compared to the Mondayafter the Fall time change when people get an extra hour of sleep, the number of accidents decreases sharply. So that's just one example,but sleep deprivation also makes people more susceptible to obesity. When you're sleep deprived you'rebody produces more cortisol which is a hormone that tellsyour body to make more fat.
You also produce more of thehormone that tells your body you're hungry, so you end upeating more and turning more of what you eat into fat whichcan contribute to weight gain. And finally sleep deprivationcan also increase your risk for depression and one theoryabout this link is that REM sleep helps your brainprocess emotional experiences, which in turn helpsprotect against depression though we're still notentirely sure about this link.
Most people, now most peopleexperience sleep deprivation at some points in their lives, but the good news isthat most people can get back on track by getting afew nights of good sleep, sort of paying back your sleep debt. Your next question might be then, quot;How much sleep is enough sleepéquot; That's kind of a hard question to answer,
but most adults needabout 78 hours of sleep, but the exact number variesby individual and by age. Babies need a lot more sleep,for example, than older adults often sleep less than 10 or 8hours without severe detriments. Again everyone has troublefalling asleep at some point, but people who have persistentproblems in falling or staying asleep have a more seroussleep disorder called insomnia. There are various medicationsthat can help people