Tag Sleep deprivation

Sleep patterns can affect your personality and level of success | Irish Examiner


MRI-REM

Sleep patterns can affect your personality and level of success | Irish Examiner.

Dr Jessica Rosenberg of the Institute of Neuroscience and Medicine in Jülich, Germany says: “Our results show that extreme ‘late chronotypes’ (night owls) show differences in the diffusion of water molecules in areas belonging to the white matter of the brain as compared to early and intermediate chronotypes (larks).”

This indicates a difference in the level of signal transmission, or communication between brain areas, she explains.

This could be linked to depression in owls, who suffer a kind of ‘jet lag’ by being forced to reluctantly participate in a world of early risers which is in conflict with their natural tendency to sleep late. 

The fact that night-owls show a much larger ‘discrepancy’ than early risers between individual sleep preferences and normal work schedules can lead to what she calls “the accumulation of a substantial sleep deficit during the working week”.

And, as much research has shown, there are links between depression and lack of sleep.

Also, studies carried out at the University of Western Sydney reveal that a night owl is more likely to be narcissistic and more Machiavellian in their desire to manipulate others — and may even be more inclined towards callousness and insensitivity.

To read more, please click on the link above.

10 Tips for Effective Networking Even When Sleepy and Tired


Réception de la délégation de Kalymnos à Arles
 
Studies have shown that we are not at our best in social interactions when sleepy. We are too tired to care, talk, or connect. How can we form lasting bonds and grow our network even when tired? The following are a few helpful tips.  Use them when attending a high profile event after a long and tiring day.
  1. Smile often and try to be happy. Studies have shown decreased subjective rating of happiness by sleep-deprived people. Make a conscious effort to neutralize it.
  2. Learn the big art of small talkExpress genuine interest in others’ lives and interests. 
  3. Relax and enjoy. If you are relaxed, you will appear relaxed.
  4. Look in the eyes when talking. When sleep deprived, we are unable to accurately recognize emotions. Paying attention and looking in the eyes help counteract this deleterious effect. 
  5. Talk slow, think fast. When sleep deprived, our speech tends to be difficult to comprehend especially in a noisy venue.
  6. Be humble and polite. Tiredness may bring a tone of arrogance in our voice. 
  7. Pause before speaking. Studies have shown that when sleep deprived, we tend to be reactive. A pregnant pause before making an important statement can help. 
  8. Avoid awkward situations. Identify in advance what makes you uncomfortable, and then design a strategy to address it. 
  9. Be perceptive. Poor sleep impairs our situational awareness. Make a conscious effort to neutralize that deficit.
  10. Be fearless. Sleep deprivation puts our Amygdala, the fear center, in an overactive mode. This may make you diffident. Overcome it, mingle freely, and have a blast.

 Remember, even when tired, we can form lasting bonds and even better yet, enjoy the function. Best wishes. Go out and have fun.

 
 
 

Lack of sleep may cause obesity by affecting brain’s ability to choose healthy food


Main health effects of sleep deprivation (See ...

Main health effects of sleep deprivation (See Wikipedia:Sleep deprivation). Model: Mikael Häggström. To discuss image, please see Template talk:Häggström diagrams (Photo credit: Wikipedia)

Lack of sleep may cause obesity by affecting brain’s ability to choose healthy food – Telegraph.

Two new studies that scanned the brains of people who have been sleep deprived have revealed their brains react differently when presented with choices of healthy and unhealthy food compared to those who have had adequate sleep.

The research showed that key areas of the brain related to reward were activated while activity in regions that control behaviour were inhibited.

The findings may help to explain the link between sleep deprivation and obesity.

Dr Marie-Pierre St-Onge, from Columbia University in New York who led one of the studies, said: “The results suggest that, under restricted sleep, individuals will find unhealthy foods highly salient and rewarding, which may lead to greater consumption of those foods.”

In her study 25 men and women of normal weight were asked to look at images of healthy and unhealthy food while in an fMRI scanner after five nights where their sleep was either restricted to just four hours or they were allowed to get up to nine hours.

In those who had less sleep, the reward centres of the brain were more active when shown pictures of unhealthy food compared to those who had more sleep.

When they were shown pictures of healthy food this area of the brain did not activate.

Dr St-Onge, who is presenting the research at the annual conference of the American Academy of Sleep Medicine and the Sleep Research Society, added: “This may suggest greater propensity to succumb to unhealthy foods when one is sleep restricted.

“Indeed, food intake data from this same study showed participants ate more overall and consumed more fat after a period of sleep restriction compared to regular sleep.”

The second study, also being presented at the conference, looked at 23 healthy adults after a normal nights sleep and a night where their sleep had been restricted.

After each night, the participants were asked to rate how much they wanted food items shown to them while inside a fMRI scanner.

Stephanie Greer, who conducted the work at the sleep and neuroimaging laboratory at the University of California, Berkeley, said sleep deprivation impaired the activity in the frontal lobe of the participants brains – an area critical for behaviour control and making choices.

She said they failed to see any activity in areas of the brain associated with reward in this study.

She said: “It seems to be about he regions higher up in the brain, specifically within the frontal lobe, failing to integrate all the different signals that help us normally make wise choices about the food we eat.”

She added that if people cannot make the right choices about what food to eat after suffering from poor sleep, it may explain why other studies have found a lack of sleep is risk factor for obesity.

Sleep apnea linked to cancer death risk


English: The Cycle of Obstructive Sleep Apnea ...

English: The Cycle of Obstructive Sleep Apnea – OSA (Photo credit: Wikipedia)

MedWire News – Respiratory – Sleep apnea linked to cancer death risk.

Sleep apnea linked to cancer death risk
By Lucy Piper
25 May 2012
Am J Respir Crit Care Med 2012; Advance online publication
MedWire News: Sleep-disordered breathing (SDB), or sleep apnea, is associated with an increased risk for cancer mortality, study findings show.
“Remarkably, the association was stronger in relative terms than that of SDB with mortality from all causes as well as that previously observed for cardiovascular mortality,” say F Javier Nieto, from the University of Wisconsin School of Medicine and Public Health in Madison, USA, and colleagues.
Data on 1522 participants of the Wisconsin Sleep Cohort were studied. Of these, 222 had mild SDB (apnea-hypopnea index [AHI]=5 to 14.9 apnea and hypopnea events per hour of sleep), 84 had moderate SDB (AHI=15 to 29.9), and 59 had severe SDB (AHI=30 or above or had a continuous positive airway pressure [CPAP] device present during sleep assessment).
Over a 22-year period, there were a total of 112 deaths, of which 50 were attributed to cancer, the most frequent being lung cancer (n=8).
After adjusting for age, gender, body mass index, and smoking, SDB showed a dose-response relationship with cancer mortality.
Patients with mild SDB were 1.1 times more likely to die from cancer than individuals without SDB, while those with moderate and severe SDB were a respective 2.0 and 4.8 times more likely. This relationship persisted when patients treated with CPAP were excluded from analyses.
The researchers note that the risk for cancer mortality also increased in line with hypoxemia index severity. Participants in the top hypoxemia index category (11.2% of the night at less than 90% oxygen saturation) had a more than eight times higher risk for cancer mortality than those in the lower category (0.8% of the night at less than 90% oxygen saturation).
This finding supports previous animal studies showing an association between intermittent hypoxia and accelerated cancer progression, and therefore hints at a mediatory effect of hypoxia on increased tumor tissue angiogenesis and resulting cell proliferation and tumor growth, the researchers explain.
They conclude in the American Journal of Respiratory and Critical Care Medicine that if their findings are validated in further clinical and population-based studies, “diagnosis and treatment of SDB in cancer patients may be indicated to prolong survival in cancer patients.”
MedWire (www.medwire-news.md) is an independent clinical news service provided by Springer Healthcare Limited. © Springer Healthcare Ltd; 2012

Treating Sleep Disorder Improves Psychiatric Outcomes


Treating Sleep Disorder Improves Psychiatric Outcomes.

An interesting article. Helpful even if you do not suffer from a psychiatric disorder as it highlights the effect of poor sleep on mood and emotions.

Sleep well, lead well.

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