Tag Archives | Sleep
An interesting read for night owls and early birds alike. As Robert T. Gonzalez writes on io9.com:
Just because you sleep later than your early rising friends doesn’t mean you sleep longer than they do; nor does it make you lazier. And yet, the association between the time of day that a person wakes up and how proactive or driven they are is just one example of the many preconceptions that society upholds regarding sleep and productivity.
But here’s the problem: these expectations might actually be working against us.
In his recently published book, Internal time: Chronotypes, Social Jet Lag and Why You’re So Tired, German chronobiologist Till Roenneberg provides numerous examples of how social expectations surrounding time may be having a detrimental effect on large sections of the human population. Over on Brain Pickings, Maria Popova walks us through one of Roenneberg’s examples, wherein he examines the clash between adolescents’ sleep cycles and the starting times of typical school days…
Read More on io9.com
If this app works, how long before others start to “program” your dreams in ways you may not want? From CNN:
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Harvard PhD student Daniel Nadler is trying to bring a really rudimentary version of the movie “Inception” to life with a new iPhone app that aims to help you “program your dreams.”
Called Sigmund, the 99-cent app builds off of pre-existing sleep science to help people “program” the content of their dreams from a list of 1,000 keywords. After you select one to five words from the list, a sorta-soothing, sorta-robotic female voice reads the words you select during the deepest moments of your sleep cycle – the REM cycles – when you’re most likely to dream vividly. In a sleep study that was the basis for the app, 34% to 40% of participants’ dreams were memorably altered by the suggestive readings, he said.
“Obviously what goes on in the sleeping brain is not entirely remembered so it could actually be a higher incorporation rate,” he said.
Here’s a brain teaser: Your task is to move a single line so that the false arithmetic statement below becomes true.
IV = III + IIIDid you get it? In this case, the solution is rather obvious – you should move the first “I” to the right side of the “V,” so that the statement now reads: VI = III + III. Not surprisingly, the vast majority of people (92 percent) quickly solve this problem, as it requires a standard problem-solving approach in which only the answer is altered. What’s perhaps a bit more surprising is that nearly 90 percent of patients with brain damage to the prefrontal lobes — this leaves them with severe attentional deficits, unable to control their mental spotlight — are also able to find the answer ...
We often worry about lying awake in the middle of the night - but it could be good for you. A growing body of evidence from both science and history suggests that the eight-hour sleep may be unnatural. In the early 1990s, psychiatrist Thomas Wehr conducted an experiment in which a group of people were plunged into darkness for 14 hours every day for a month. It took some time for their sleep to regulate but by the fourth week the subjects had settled into a very distinct sleeping pattern. They slept first for four hours, then woke for one or two hours before falling into a second four-hour sleep. Though sleep scientists were impressed by the study, among the general public the idea that we must sleep for eight consecutive hours persists ...
Insects have bugged human beings for a long time. Via Discover:
In a South African cave, researchers have uncovered traces of the oldest known human bedding, 77,000-year-old mats made of grasses, leaves, and other plant material. While it’s not especially surprising that early humans would have found a way to improve the cold, generally unpleasant experience of sleeping on a cave floor, archaeologists know little about our ancestors’ sleeping habits and habitats.
Using scanning electron microscopy, the researchers identified several species of local rushes and grasses that made up the bulk of the mattress, as well as leaves of the Cryptocarya woodii tree. These leaves contain chemical compounds that repel mosquitoes, lice, and other insects, suggesting that the cave’s ancient residents protected their bedding with natural insecticide.
Are we about to witness the foundation of Mothers Against Early Classes? ScienceDaily reports:
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A study in the April 15 issue of the Journal of Clinical Sleep Medicine shows increased automobile crash rates among teen drivers who start school earlier in the morning.
Results indicate that in 2008 the weekday crash rate for 16- to 18-year-olds was about 41 percent higher in Virginia Beach, Va., where high school classes began at 7:20 — 7:25 a.m., than in adjacent Chesapeake, Va., where classes started at 8:40 — 8:45 a.m. There were 65.8 automobile crashes for every 1,000 teen drivers in Virginia Beach, and 46.6 crashes for every 1,000 teen drivers in Chesapeake. Similar results were found for 2007, when the weekday crash rate for Virginia Beach teens (71.2) was 28 percent higher than for Chesapeake teens (55.6). In a secondary analysis that evaluated only the traditional school months of September 2007 through June 2008, the weekday crash rate for teen drivers was 25 percent higher in Virginia Beach (80.0) than in Chesapeake (64.0).
For a small group of people—perhaps just 1% to 3% of the population—sleep is a waste of time. Natural "short sleepers," as they're officially known, are night owls and early birds simultaneously. They typically turn in well after midnight, then get up just a few hours later and barrel through the day without needing to take naps or load up on caffeine. They are also energetic, outgoing, optimistic and ambitious...
Interesting article from Robert Alison in the Winnipeg Free Press earlier in the year:
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Sleep is a fundamental component of animal biology. New evidence confirms that, in humans, its timing reflects intelligence. People with higher IQ’s (intelligence quotients) tend to be more active nocturnally, going to bed later, whereas those with lower IQ’s usually retire to bed sooner after nightfall.
The precise function of sleep is arguable. But, accumulating evidence shows that lack of sleep in humans and animals can result in obesity, high blood pressure and reduced life spans. Drowsiness impairs mental performance. For instance, 37 per cent of all motor vehicle accidents are caused by drowsy motorists, according to a University of Pennsylvania study. Even minor sleep deficiencies impact on body chemistry.
According to Juliette Faraco of Stanford University, sleep loss generates a proportionate need for “sleep rebound”. One of the most controversial and significant recent findings is the correlation in humans between the earliness/lateness of sleep preferences and intelligence.
Is it just a British thing? From the Telegraph:
More than a third of adults still hug a childhood soft toy while falling asleep, according to a new survey. More than half of Britons still have a teddy bear from childhood and the average teddy bear is 27 years old, the poll found.
Travelodge, the hotel chain, surveyed 6,000 British adults and found that respondents said sleeping with a teddy a “comforting and calming” way to end the day.
The survey also found that 25 per cent of men said they even took their teddy away with them on business because it reminded them of home.
Travelodge said that in the past year staff have reunited more than 75,000 teddies and their owners.
Spokesman Shakila Ahmed said: “Interestingly the owners have not just been children, we have had a large number of frantic businessmen and women call us regarding their forgotten teddy bear.”
Corrine Sweet, a psychologist, said cuddling a teddy bear was an ‘important part of our national psyche’…
[continues in the Telegraph]