Tuesday, December 04, 2007

Dormir la privation

A 1996 study by the University of Chicago Medical Center showed that sleep deprivation severely affects the human body's ability to metabolize glucose, which can lead to early-stage Type 2 Diabetes.

Sleep deprivation can adversely affect brain function. A 2000 study, by the UCSD School of Medicine and the Veterans Affairs Health-care System in San Diego, used functional magnetic resonance imaging technology to monitor activity in the brains of sleep-deprived subjects performing simple verbal learning tasks. The study showed that regions of the brain's pre-frontal cortex displayed more activity in sleepier subjects. Depending on the task at hand, the brain would sometimes attempt to compensate for the adverse effects caused by lack of sleep. The temporal lobe, which is a brain region involved in language processing, was activated during verbal learning in rested subjects but not in sleep deprived subjects. The parietal lobe, not activated in rested subjects during the verbal exercise, was more active when the subjects were deprived of sleep. Although memory performance was less efficient with sleep deprivation, greater activity in the parietal region was associated with better memory.

According to a 2000 study published in the British Scientific Journal, researchers in Australia and New Zealand reported that sleep deprivation can have some of the same hazardous effects as being drunk. People who drove after being awake for 17–19 hours performed worse than those with a blood alcohol level of .05 percent, which is the legal limit for drunk driving in most western European countries (the U.S. and UK set their blood alcohol limits at .08 percent). In addition, as a result of continuous muscular activity without proper rest time, effects such as cramping are much more frequent in sleep-deprived individuals. Extreme cases of sleep deprivation have been reported to be associated with hernias, muscle fascia tears, and other such problems commonly associated with physical overexertion. Beyond impaired motor skills, people who get too little sleep may have higher levels of stress, anxiety and depression, and may take unnecessary risks. According to the National Highway Traffic Safety Administration, over 100,000 traffic accidents each year are caused by fatigue and drowsiness.

A 2001 Study at Chicago Medical Institute suggested that sleep deprivation may be linked to more serious diseases, such as heart disease, mental illnesses, such as psychosis, bipolar and even death.

Animal studies suggest that sleep deprivation increases stress hormones, which may reduce new cell production in adult brains.

Wanna keep working overnights? Wanna keep jeopardizing your health and the safety of those who maybe count on you for transport? Is it worth it? Yeah, you probably know better then a bunch of Dr.'s and Scientist's with degrees and stuff, huh?

(((03)))

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