研究表明：女性比男性需要更多睡眠
Women DO need more sleep than men: Multi-tasking means their brains take longer to recoverIt is a subject that can divide the closest of couples - who needs more sleep, women or men?
Now, U.S. researchers say they have the answer: Women's brains need more time to recover because they do more multi-tasking during the day.
The Duke University scientists, in North Carolina, found women who are sleep deprived often suffer from depression and become angry.
In contrast, these issues do not affect men who have not had much sleep, according to Science World Report.
Previous studies have also linked a lack of sleep to increased risk of heart disease, mental health problems, strokes and inflammation within the body.
Dr Michael Breus, a sleep expert, believes some sleep deprived women develop such severe inflammation in their bodies that they actually wake up suffering physical pain.
Dr Breus says women can avoid some of the problems associated with sleep deprivation by taking naps.
However, he says naps should not be longer than 90 minutes as this can increase sleepiness.
‘One of the major functions of sleep is to allow the brain to recover and repair itself,’ said Professor Jim Horne, director of the Sleep Research Centre at Loughborough University.
‘During deep sleep, the cortex - the part of the brain responsible for thought, memory, language and so on - disengages from the senses and goes into recovery mode.
‘The more of your brain you use during the day, the more of it that needs to recover and, consequently, the more sleep you need.’
He added that women need more sleep as they use more of their brains than men do because they multi-task more.
He explained that a man with a demanding job that requires a lot of lateral thinking may also require extra sleep.
据英国《每日邮报》报道，对于“男性和女性，谁需要更多睡眠”这个问题，美国的研究人员称他们找到了答案：女性的大脑需要更多时间恢复，因为她们在一天中要进行更多的多任务处理。位于北加州的杜克大学发现睡眠不足的女性经常会抑郁或者易怒。相反，据《科学世界报道》，睡眠不足的男性却不会显示这些特征。早前的研究还认为，睡眠不足与心脏病、精神健康、中风以及体内发炎也有关。
睡眠问题专家迈克尔?布瑞斯认为，越来越多睡眠不足的女性体内发炎严重，以至她们醒来时会感到肢体疼痛。他说，女性可以通过睡午觉和不时打盹来避免这些问题，但他强调，打盹时间不能超过90分钟，否则会引起更强的倦意。“睡眠的主要功能之一就是让大脑恢复并修复自身，” 拉夫堡大学睡眠研究中心主任吉姆?霍恩教授表示：“在睡眠中，大脑中负责思维、记忆和语言等功能的皮质会从感知中暂时脱离，进入恢复模式。”他说，女性需要更多睡眠是因为她们的大脑从事更多的多任务工作，但从事高要求工作、需要很多横向思维的男性也同样需要更多的睡眠。
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