看下这个?
这个女科学家是治疗抑郁症的, 研究睡眠
关于睡眠的科学ZT(有删减）
http://www.nzherald.co.nz/search/story.cfm?storyid=000044A8-EF3B-15F0-A2D583027AF1010E
"Those of us who like to sleep longer are considered lazy," she says. "But it's not true."
* The amount of sleep we need is partly genetically pre-determined.
Traditionally, Western society has deemed that eight hours' sleep is the right prescription for everyone. But it's not as simple as that - and it no longer seems to be true.
A study of American sleep patterns in the 1970s found eight hours was the average, says Wirz-Justice. But 20 years later, the same study found the average had dropped to seven. It's a phenomenon she expects is common elsewhere, including New Zealand.
So how much is enough? "The answer is a very individual one," she says. Genetic and physiological factors come into the equation. Some of us, it seems, are destined to be long sleepers, others short. "There's no judgment about what is better."
Different stages of life determine how much sleep is needed too. Newborn babies spend most of their day asleep. "But as we grow older, [sleep duration] depends on the biological clock as well as the time of year," says Wirz-Justice. "One important point is women would sleep longer than men had they the chance to do so - but they never do."
