A study in the November 1, 2010 issue of the journal Sleep found that vulnerability to sleep deprivation is influenced by the interaction between waking social activity and individual personality traits. Results show that extraverts who were exposed to 12 hours of social interaction were more vulnerable to subsequent sleep deprivation than those who were exposed to an identical period of isolated activity.
Individuals who experience trauma during childhood appear more likely to develop chronic fatigue syndrome as adults, according to a report in the January, 2009, issue of Archives of General Psychiatry, one of the JAMA/Archives journals. In addition, neuro–endocrine dysfunction — or abnormalities in the interaction between the nervous system and endocrine system — appears to be associated with childhood trauma in those with chronic fatigue syndrome, suggesting a biological pathway by which early experiences influence adult vulnerability to illness.
Chronic fatigue syndrome affects as many as 2.5 percent of U.S. adults, according to background information in the article. Little is known about the causes and development of the condition. Risk factors include female sex, genetic predisposition, certain personality traits and physical and emotional stress. “Stress in interaction with other risk factors likely triggers chronic fatigue syndrome symptoms through its effects on central nervous, neuro–endocrine and immune systems, resulting in functional changes that lead to fatigue and associated symptoms such as sleep disruption, cognitive impairment and pain,” the authors write.
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As of May 2, 2009 at 9:47 p.m. (-0500) (ET), the U.S. population
was 306,340,710. Sleep researchers estimate approximately seven percent
of the population suffers from obstructive sleep apnea. Using that
estimate, there are potentially 21,443,850 apneics in the U.S.
~~ Apnea around the world ~~
As of May 2, 2009 at 9:47 p.m. (-0500) (ET), the world population
was 6,777,286,604. Sleep researchers estimate approximately seven percent
of the population suffers from obstructive sleep apnea. Using that
estimate, there are potentially 474,410,062 apneics in the world.
