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The others were "normal sleepers," whose midpoints were before 5 30 a.m.
It's been shown that patients with insomnia, who experience less slow-wave sleep than normal sleepers, show impaired memory consolidation.
The study is hardly conclusive, experts said, because it included only 20 people and had no control group of normal sleepers for comparison.
A recent pilot study reported that hippocampal volume (HV) was reduced in patients with primary insomnia (PI) relative to normal sleepers.
A longitudinal study of about 1,000 adults ages 21 to 30 enrolled in a Michigan health maintenance organization found that, compared with normal sleepers, those who reported a history of insomnia during an interview in 1989 were four times as likely to develop major depression by the time of a second interview three years later.
A study presented last month at a meeting of the North American Association for the Study of Obesity, for example, found that people who sleep two to four hours a night were 73percentt more likely to be obese than normal sleepers.
Similar(10)
If you ask a normal sleeper how they do it, they will tell you they do nothing.
Every 90 minutes, a normal sleeper cycles between two major categories of sleep — although the length of time spent in one or the other changes as sleep progresses.
This change is not enough to consider the patient a good or even normal sleeper.
Receiver-operator characteristic curve analyses were used to compare a range of severity and frequency criteria sets for discriminating the insomnia and normal-sleeper groups.
– 06 00 a.m. and the characteristics of this group were compared to normal phase sleepers.
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CEO of Professional Science Editing for Scientists @ prosciediting.com