Bilim Adamlarına Göre Öğle Uykusu Daha Fazla Öğrenebilmeyi Sağlıyor — People Learn More After A Siesta, Says Scientists

People Learn More After A Siesta öğle uykusu, Say Scientists

Ian Sample

The Guardian, Monday 22 February 2010

Psychologists say sleep clears the brain's short term kısa süreli memory and makes space boşluk for new facts to be remembered.

Curling up kıvrılmak for an afternoon nap şekerleme can improve the brain's ability to learn by clearing out cluttered darmadağın memory space, psychologists say.

People who nodded off uyuklamak for an hour after lunch performed better in learning tests than those who stayed awake uyanık all afternoon, the scientists found.

A study of students revealed göstermek that their brains were refreshed dinçleşmek by napping only if they entered what is called stage 2 non-REM sleep, which takes place between deep sleep and the dream state, known as REM Hızlı Göz Hareketi; uykunun rüya görülen kısmında gözlerin hızlıca oynatılması or rapid eye movement sleep.

The findings sonuç support a habit alışkanlık made famous by Sir Winston Churchill, who considered it part of his daily routine to climb into bed at some point between lunch and dinner.

The research follows a recent study by the same group that showed that staying up all night reduced students' ability to cram saklamak new facts by nearly 40%, a consequence sonuç, they said, of brain regions effectively shutting down through sleep deprivation yoksunluk. "Sleep not only rights the wrong of prolonged uzatılmış wakefulness but, at a neurocognitive level, it moves you beyond where you were before you took at nap," said Matthew Walker at the University of California, Berkeley.

The findings may explain why our ability to learn falls as we age yaşlanmak, since people tend eğilimi olmak to sleep less as they get older.

Walker's team recruited toplamak 39 students for the study and divided them into two groups. At midday öğle vakti, all of the volunteers gönüllü took part in a learning test designed to exercise a region of the brain called the hippocampus beyindeki beyaz çıkıntı, which is involved in storing memories. Two hours later, one of the groups settled down for a siesta while the other group stayed awake. Later that afternoon, at 6pm, both groups took part in a second round of learning tests. Those who napped for an hour not only performed better than the group that stayed awake, they scored better than they did in the first round of tests.

The findings suggest that sleep clears the brain's short term memory and makes room for new facts to be remembered, Walker told the American Association for the Advancement of Science meeting in San Diego.

Previous studies have established that fact-based memories are stored temporarily geçici olarak in the hippocampus before they are moved to the prefontal beynin alın lobunun önünde olan cortex beyin zarı region of the brain. "It's as though the email inbox in your hippocampus is full and, until you sleep and clear out those fact emails, you're not going to receive any more mail. It's just going to bounce until you sleep and move it into another folder," Walker said.

In the latest study, Walker's team used electrodes to take EEGs, or electroencephalograms, of the students and identified the sleep phase that was critical for their memories to be refreshed.

Humans spend half of their sleeping hours in stage 2 non-REM sleep. "I can't imagine Mother Nature would have us spend 50 per cent of the night going from one sleep stage to another for no reason," Walker said.