Almost a third of life we spend sleeping - or so it should. Sleep is much more than a passive activity: we need the time to clean our minds and re-energize our body.
If we do not rest enough, there are certainly physical and mental disorders, like when I drink too much alcohol. According to researchers, there are four stages of sleep, and a person needs to complete a 90-110 minutes for a whole cycle, which means that, per night, go through about five times all four stages of sleep.
Stage 1 occurs in the first 5-10 minutes of sleep cycle. During this time it is very easy to be awakened, and muscles begin to relax. Now is the time that is most likely to experience muscle zvâcnituri or feel that you are in free fall.
Stage 2 starts mid cycle of sleep and takes 45-50 minutes. If you woke up this range may feel disoriented. Breathing is relaxed, the body temperature drops, giving a slight respite heart. Neural activity decreases as well as the body prepares for the next phase of the cycle.
Stage 3 marks when you walked about 20 minutes in deep sleep, and the body has a chance to regulate itself. Brain waves are slow, muşhii and begin to regenerate tissues and a number of hormones are secreted by the body. Waste management systems in the brain becomes very active, eliminating what bothers cognitive function. Despite the fact that this is the time we load the batteries, now we are most likely to walk or talk in your sleep. At this stage, it is incredibly hard to be awake.
Rapid Eye Movement (REM) is the final stage in this cycle, which takes about 20 minutes. Though the eyes are closed, they move very quickly under the eyelids. Brain activity is intense in this period took place a lot of dreams. Also now, the muscles are paralyzed and are irregular heartbeat.
Source: descopera.ro
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