The ‘body clock’ or circadian rhythms controls things like alertness, sleep patterns, appetite and hormones, and travelling across time zones or working nights can disturb it. […]

The researchers found that two nuclear receptors (receptors that sense hormones), called REV-ERB-α and REV-ERB-β, control the circadian expression of core circadian clock and lipid homeostatic gene networks. Not getting enough sleep puts you at increased risk of obesity, diabetes and related metabolic disorders.

{ Genome Engineering | Continue reading }

After a busy week with short nights, many use the weekend to make up for lost hours of sleep. Not a healthy habit, says researcher Paulien Barf. On the long run it could result into the development of obesity or even diabetes. (…) Previous studies have shown that sleeping to recover from sleep shortage is of importance for a variety of physiological processes.

{ United Academics | Continue reading }

photo { Lee Friedlander, Nude, 1980 }

Albert Tirrell and Mary Bickford had scandalized Boston for years, both individually and as a couple, registering, as one observer noted, “a rather high percentage of moral turpitude.” Mary, the story went, married James Bickford at 16 and settled with him in Bangor, Maine. They had one child, who died in infancy. Some family friends came to console her and invited her to travel with them to Boston. Mary found herself seduced by the big city. (…)

James came to Boston at once, found Mary working in a house of ill repute on North Margin Street and returned home without her. She moved from brothel to brothel and eventually met Tirrell, a wealthy and married father of two. He and Mary traveled together as man and wife, changing their names whenever they moved, and conducted a relationship as volatile as it was passionate; Mary once confided to a fellow boarder that she enjoyed quarreling with Tirrell because they had “such a good time making up.” (…)

Choate kept that case in mind while plotting his defense of Tirrell, and considered an even more daring tactic: contending that Tirrell was a chronic sleepwalker. If he killed Mary Bickford, he did so in a somnambulistic trance and could not be held responsible.

{ Smithsonian | Continue reading }

photo { Linus Bill }

Some scientists argue that the purpose of sleep may not be restorative. In fact, they argue that the very question “why do we sleep?” is mistaken, and that the real question should be “why are we awake?” (…)

The world record for going without sleep is eleven days.

{ BBC | Continue reading }

photo { Adrienne Grunwald }

Both scientists and artists have suggested that sleep facilitates creativity, and this idea has received substantial empirical support. In the current study, we investigate whether one can actively enhance the beneficial effect of sleep on creativity by covertly reactivating the creativity task during sleep.

Individuals’ creative performance was compared after three different conditions: sleep-with-conditioned-odor; sleep-with-control-odor; or sleep-with-no-odor. In the evening prior to sleep, all participants were presented with a problem that required a creative solution. In the two odor conditions, a hidden scent-diffuser spread an odor while the problem was presented. In the sleep-with-conditioned-odor condition, task reactivation during sleep was induced by means of the odor that was also presented while participants were informed about the problem. In the sleep-with-control-odor condition, participants were exposed to a different odor during sleep than the one diffused during problem presentation. In the no odor condition, no odor was presented.

After a night of sleep with the conditioned odor, participants were found to be: (i) more creative; and (ii) better able to select their most creative idea than participants who had been exposed to a control odor or no odor while sleeping.

These findings suggest that we do not have to passively wait until we are hit by our creative muse while sleeping. Task reactivation during sleep can actively trigger creativity-related processes during sleep and thereby boost the beneficial effect of sleep on creativity.

{ Journal of Sleep Research/Wiley }

Waking up from surgery can be disorienting. One minute you’re in an operating room counting backwards from 10, the next you’re in the recovery ward sans appendix, tonsils, or wisdom teeth. And unlike getting up from a good night’s sleep, where you know that you’ve been out for hours, waking from anesthesia feels like hardly any time has passed. Now, thanks to the humble honeybee, scientists are starting to understand this sense of time loss. New research shows that general anesthetics disrupt the social insect’s circadian rhythm, or internal clock, delaying the onset of timed behaviors such as foraging and mucking up their sense of direction. (…)

Warman says his team is currently looking at whether shining bright light at someone under anesthesia—a well known way to alter the circadian clock—could also reduce the procedure’s disorienting effects.

{ Science | Continue reading }

photo { Steve Shapiro, Truman Capote, Kansas, 1967 }

Homicidal sleepwalking, also known as homicidal somnambulism, is the act of killing someone during an episode of sleepwalking.

About 68 cases had been reported in the literature up to 2000.

{ Wikipedia | Continue reading }

photo { Anja Niemi }

Walker and his team tried to measure how sleeping can help us to process bad experiences. (…)

The results show that during the REM sleep the part of the brain that processes the emotions (the amygdala) decreased its activity, so that the prefrontal cortex, linked to rational actions, probably weakened the impact of a bad experience. Also, they noticed a drop in the levels of brain chemicals that are linked to stress.

“Somewhere between the initial event and the later point of recollecting, the brain has performed an elegant trick of divorcing emotions from memory, so it’s no longer itself emotional,” Walker said.

{ United Academics | Continue reading }

Both correlational and experimental evidence suggest that when people are sleep deprived, they feel more irritable, angry and hostile. Sleep loss is also associated with greater depressive mood. In addition, sleep deprivation seems to be associated with greater reactivity in that people who suffer from sleep loss are especially likely to react negatively when something doesn’t go well for them. For those of you interested in the brain – some research suggests that sleep deprivation enhances negative mood due to increased amygdale activity (a brain structure integral to experiences of negative emotions such as anger and rage) and a disconnect between the amygdale and the area of the brain that regulates its functions. In other words: increased negative mood, and decreased ability to regulate that anger.

{ Psych Your Mind | Continue reading }

Stimulus Control Therapy consists of six very straightforward steps. If you follow these it should improve your sleep.

1. Lie down to go to sleep only when you are sleepy.

2. Do not use your bed for anything except sleep; that is, do not read, watch television, eat, or worry in bed. Sexual activity is the only exception to this rule. On such occasions, the instructions are to be followed afterwards, when you intend to go to sleep.

3. If you find yourself unable to fall asleep, get up and go into another room. Stay up as long as you wish and then return to the  bedroom to sleep. Although we do not want you to watch the clock, we want you to get out of bed if you do not fall asleep immediately. Remember the goal is to associate your bed with falling asleep quickly! If you are in bed more than about 10 minutes without falling asleep and have not gotten up, you are not following this instruction.

4. If you still cannot fall asleep, repeat step 3. Do this as often as is necessary throughout the night.

5. Set your alarm and get up at the same time every morning irrespective of how much sleep you got during the night. This will help your body acquire a consistent sleep rhythm.

6. Do not nap during the day.

{ PsyBlog | Continue reading }

The majority of people reading this sentence will, at some point in their lives, undergo a medical treatment that requires general anesthesia. Doctors will inject them with a drug, or have them breathe it in. For several hours, they will be unconscious. And almost all of them will wake up happy and healthy.

We know that the general anesthetics we use today are safe. But we know that because they’ve proven themselves to be safe, not because we understand the mechanisms behind how they work. The truth is, at that level, anesthetics are a big, fat question mark.

{ Boing Boing | Continue reading }

You probably already know whether you’re a morning or evening person, but if you’re not sure, here are two ways to figure it out:

1) On weekends, or when you don’t have to wake up at any particular time, when do you naturally wake up? If the answer is more than an hour or so different from when you wake up on weekdays, chances are you’re an evening person by nature. Morning people tend to wake up just as early on weekends as they do during the week.

2) Regardless of how much sleep you’ve gotten, when do you find that you have the most energy? If your energy peaks in the morning and dwindles by late afternoon, you’re a morning person. If it peaks later in the evening - you guessed it - you’re an evening person. (…)

The debate over whether it’s better to be a night owl or an early bird has been going on for centuries. (…) Research on the advantages and disadvantages of each “chronotype” has yielded mixed results, in part because it is difficult to conduct this research experimentally. (…)

Evolutionary psychologists have suggested that a preference for late hours may suggest a higher level of intelligence because being a night owl is presumably an evolutionary novel preference, though this hypothesis is controversial.

{ Psych Your Mind | Continue reading }

painting { Edward Hopper, Summer Interior, 1909 }