Brief awakenings at night may be a sign you’ve slept well.
We tend to think a good night's sleep should be uninterrupted, but surprising new research from the University of Copenhagen suggests just the opposite: Brief awakenings may be a sign you’ve slept well., done on mice, found that the stress transmitter noradrenaline wakes up the brain many times a night. These"microarousals" were linked to memory consolidation, meaning they help you remember the previous day's events.
The findings add insight to what happens in the brain during sleep and may help pave the way for new treatments for those who have sleep disorders.Previous research has suggested that noradrenaline — a hormone that increases during stress but also helps you stay focused — is inactive during sleep. So, the researchers were surprised to see high levels of it in the brains of the sleeping rodents.stress system during sleep. We could not believe our eyes," Kjaerby says.
"We have shown that the amount of these super-boosts of sleep spindles, and not REM sleep, defines how well you remember the experiences you had prior to going to sleep," says Kjaerby. that shows we wake up roughly 100-plus times a night, mostly during NREM sleep stage 2 , Kjaerby says.
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