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robertogreco : sleepdisorder   3

Delayed sleep phase syndrome (DSPS) - Wikipedia [Story of my life]
"…also known as delayed sleep-phase disorder or delayed sleep-phase type, is a circadian rhythm sleep disorder, a chronic disorder of the timing of sleep, peak period of alertness, the core body temperature rhythm, hormonal and other daily rhythms, compared to the general population and relative to societal requirements. People with DSPS generally fall asleep some hours after midnight and have difficulty waking up in the morning.

Often, people with the disorder report that they cannot sleep until early morning, but fall asleep at about the same time every "night". Unless they have another sleep disorder such as sleep apnea in addition to DSPS, patients can sleep well & have a normal need for sleep. Therefore, they find it very difficult to wake up in time for a typical school or work day. If, however, they are allowed to follow their own schedules, e.g. sleeping from 4 a.m. to noon, they sleep soundly, awaken spontaneously, & do not experience excessive daytime sleepiness."
sleep  cv  science  psychology  productivity  health  via:caterina  circadianrhythms  sleepdisorder  alertness  society  mornings 
july 2011 by robertogreco
Gene Mutation Tied to Needing Less Sleep -
"Dr. Fu said that while many people might sleep only six or fewer hours a night, most were not naturally short sleepers. For instance, they use stimulants and alarm clocks to maintain a shortened sleep schedule.

“Many people get only six hours of sleep a night, but we drink coffee and tea to make ourselves stay up,” she said. “That’s a very different thing. Our body needs 8 to 8.5 hours.”

The genetic mutation appears to be rare. Out of 70 families with known sleep problems studied at the university, only one family carried the mutation. Dr. Fu said fewer than 5 percent of people appeared to be naturally short sleepers.

The real benefit of the research will come if and when the mutation is identified in other individuals. That could lead to new discoveries about sleep timing and duration, and possibly new treatments for sleep disorders."
sleep  psychology  health  science  genetics  mutations  mutants  human  sleepdisorder  insomnia  via:cervus 
april 2011 by robertogreco
Sleep paralysis - Wikipedia [AKA kanashibari, old hag, etc. Take a look at the folklore section of the article.]
"Physiologically, it is closely related to the paralysis that occurs as a natural part of REM (rapid eye movement) sleep, which is known as REM atonia. Sleep paralysis occurs when the brain awakes from a REM state, but the bodily paralysis persists. This leaves the person fully conscious, but unable to move. In addition, the state may be accompanied by terrifying hallucinations (hypnopompic or hypnagogic) and an acute sense of danger."

[Update 7 July 2013: Just tracked down the first reference I saw to this: James Luckett's blog, July 8, 2003: ]
sleepparalysis  sleep  dreaming  dreams  consciousness  psychology  sleepdisorder  srg  kanashibari  oldhag  glvo 
september 2008 by robertogreco

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