A study from the University of California (USA) published in the journal Current Biology reveals that while we dream, our brain chemistry of stress is deactivated and the brain processes emotional experiences to "erase" painful or unpleasant emotions stored in memory. This is deduced in a series of experiments carried out using magnetic resonance imaging. According to the authors, the finding offers a new explanation for why we dream.
80% of adults have nightmares at least once a year, and 5% have them more than once a month. But it is people who stay up late at night who are most at risk of nightmares, Yavuz Selvi and his colleagues at Yil University in Turkey have shown.
It is a fairly common neurological disorder, often undiagnosed, characterized by the uncontrollable urge to kick and move the legs when trying to sleep, often accompanied by pain.
According to a study conducted by the University of California, adults ages 59 to 82 are more resistant to total sleep deprivation than youth ages 19 to 38. Specifically, the researchers showed that after 36 hours without sleep, older adults kept their working memory, selective attention and verbal skills almost intact.
Interrupted sleep affects the ability to form memories and this could help explain some memory-related disorders, such as Alzheimer's disease, according to a study published in the journal Proceedings of the National Academy of Science (PNAS).
The gentle movement of the hammocks helps us fall asleep faster and achieve greater depth of sleep than a static bed, according to a study carried out by the University of Geneva (Switzerland). In addition, memory is better consolidated.
The alteration of circadian rhythms, especially in childhood, could favor the appearance of overweight. And conversely, obesity increases the risk of sleep disorders, such as insomnia, snoring or apnea.
Science confirms what our grandmothers already said: children grow while they sleep. Specifically, this childhood growth is linked to an increase in the total daily hours of sleep, as concluded by Michelle Lampl, from Emory University, in the first study of the biological mechanism of the "spurts".
Danni Büchner is invited to Sam Dylan's Halloween party. But the "Goodbye Germany" emigrant has no desire for many other party guests. And find clear words.
