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To drop off we must cool off; body temperature and the brain's sleep-wake cycle are closely linked.
That's why hot summer nights can cause a restless sleep.
The blood flow mechanism that transfers core body heat to the skin works best between 18 and 30 degrees.
If are looking for Ukrainian singles for friendship, dating, or serious relationships, you can find the perfect match for you right here.Others reckon we dream about things worth forgetting - to eliminate overlapping memories that would otherwise clog up our brains. Premature babies have 75 per cent REM sleep, 10 per cent more than full-term bubs.Similarly, a newborn kitten puppy rat or hampster experiences only REM sleep, while a newborn guinea pig (which is much more developed at birth) has almost no REM sleep at all.Tiny luminous rays from a digital alarm clock can be enough to disrupt the sleep cycle even if you do not fully wake.The light turns off a "neural switch" in the brain, causing levels of a key sleep chemical to decline within minutes.
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