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The average adult spends 36 % (or about one-third) of his or her life asleep.
Purpose of Sleep:
The first purpose of sleep is restoration.
Every day, your brain accumulates metabolic waste as it goes about its normal neural activities. Sleeping restores the brains healthy condition by removing these waste products. Accumulation of these waste products has been linked to many brain-related disorders.
The second purpose of sleep is memory consolidation.
Sleep is crucial for memory consolidation, which is responsible for your long term memories. Insufficient or fragmented sleep can hamper your ability to remember facts and feelings/emotions.
It is common knowledge that we need to sleep to be our best. And constant sleep loss has serious effects, including death.
Sleep is a neurological activity, and still, sleep-deprived cr...
Sleep, according to deep research on flies, has a function of reversing the ancient biochemical process of oxidation. Without sleep, there is no restoration possible.
Sleep studies prove it is worse than starvation, as early studies (19th century) conducted on puppies showed that they died in about five days if deprived of sleep and kept in motion.
... or ROS is a molecule that builds up in the intestines of animals that are denied sleep.
Studies conducted on fruit flies and mice showed rising levels of ROS when kept in sleep deprivation.
Antioxidants, when given to sleep-deprived flies, made them healthy and active again, proving that the artificial restoration is possible.
About 80% of our sleeping is of the SWS variety, identified by slow brain waves, relaxed muscles and deep breathing.
Deep sleep is important for the consolidation of memories. New experience...
Dreaming accounts for 20% of our sleeping time.
The length of dreams can vary from a few seconds to almost an hour. During REM sleep, the brain is highly active. The muscles are paralyzed, and the heart rate increases. Breathing can become erratic.
Although eight hours is the common mention, optimum sleep can vary from person to person and from age to age.
One review that worked through 320 research articles concluded 7 - 9 hours of sleep are enough for adults. According to experts, too little or too much sleep can both have a negative impact on your health.