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<<   作成日時 : 2013/10/06 18:07   >>

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昼寝が子どもの学習に重要
 就学前の3〜5歳の幼児は昼食後に仮眠をとることで記憶や学習に役立つという。仮眠をさせない場合と比較して、午後と翌日の視覚空間課題の結果が有意に良かったという。覚醒後に10%以上記憶が良かった。
 昼寝をすると、学習や新たな記憶統合に関連した脳部位の活性が上昇していた。

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24 September 2013 Last updated at 00:59 GMT
'Afternoon naps' aid children's learning
http://www.bbc.co.uk/news/health-24202591

Getting young children to take an hour-long nap after lunch could help them with their learning by boosting brain power, a small study suggests.

A nap appeared to help three-to-five-year-olds better remember pre-school lessons, US researchers said.

University of Massachusetts Amherst researchers studied 40 youngsters and report their findings in Proceedings of the National Academy of Sciences.

The benefit persisted in the afternoon after a nap and into the next day.

The study authors say their results suggest naps are critical for memory consolidation and early learning.

When the children were allowed a siesta after lunch they performed significantly better on a visual-spatial tasks in the afternoon and the next day than when they were denied a midday snooze.

Following a nap, children recalled 10% more of the information they were being tested on than they did when they had been kept awake.

Close monitoring of 14 additional youngsters who came to the researchers' sleep lab revealed the processes at work in the brain during asleep.

As the children napped, they experienced increased activity in brain regions linked with learning and integrating new information.

Memory aid
Lead investigator Rebecca Spencer said: "Essentially we are the first to report evidence that naps are important for preschool children.

"Our study shows that naps help the kids better remember what they are learning in preschool."

She said while older children would naturally drop their daytime sleep, younger children should be encouraged to nap.

Dr Robert Scott-Jupp, of the Royal College of Paediatrics and Child Health, said: "It's been known for years that having a short sleep can improve the mental performance of adults, for example doctors working night shifts. Up until now, no-one has looked at the same thing in toddlers. This is important, because pre-school nurseries are divided on whether they should allow their children a nap.

"Toddlers soak up a huge amount of information everyday as they become increasingly inquisitive about the world around them and begin to gain independence.

"To be at their most alert toddlers need about 11-13 hours of sleep a day, giving their active minds a chance to wind down and re-charge, ready for the day ahead. We now know that a daytime sleep could be as important as a nighttime one. Without it, they would be tired, grumpy, forgetful and would struggle to concentrate."

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Laura Kurdziel, Kasey Duclos, and Rebecca M. C. Spencer
Sleep spindles in midday naps enhance learning in preschool children
PNAS 2013 ; published ahead of print September 23, 2013, doi:10.1073/pnas.1306418110

Abstract
Despite the fact that midday naps are characteristic of early childhood, very little is understood about the structure and function of these sleep bouts. Given that sleep benefits memory in young adults, it is possible that naps serve a similar function for young children. However, children transition from biphasic to monophasic sleep patterns in early childhood, eliminating the nap from their daily sleep schedule. As such, naps may contain mostly light sleep stages and serve little function for learning and memory during this transitional age. Lacking scientific understanding of the function of naps in early childhood, policy makers may eliminate preschool classroom nap opportunities due to increasing curriculum demands. Here we show evidence that classroom naps support learning in preschool children by enhancing memories acquired earlier in the day compared with equivalent intervals spent awake. This nap benefit is greatest for children who nap habitually, regardless of age. Performance losses when nap-deprived are not recovered during subsequent overnight sleep. Physiological recordings of naps support a role of sleep spindles in memory performance. These results suggest that distributed sleep is critical in early learning; when short-term memory stores are limited, memory consolidation must take place frequently.

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