Many scientists are trying to solve the oldest riddle of the illusory world - what happens to us in a dream. Sometimes dreams flicker somewhere on the periphery of consciousness, and sometimes they amaze with their brightness or unexpected wisdom.
In a dream, the work of all life support systems of the body slows down: the metabolism reaches its lowest point of activity, blood pressure drops, the pulse becomes less frequent, the sensitivity of the nervous system to light, sounds, and even pain weakens, the body temperature slightly decreases, breathing slows down and at times goes astray. … In addition, there is strong evidence that the brain uses sleep time to rid itself of excess electricity and clear the memory system.
What happens in the human body at night?
22:00 - the number of leukocytes in the blood doubles - it is the immune system that checks the territory entrusted to it. Body temperature drops. The biological clock beeps: it's time to sleep.
23:00 - the body relaxes more and more, but recovery processes are in full swing in every cell.
24:00 - dreams are taking over consciousness more and more, and the brain continues to work, putting the information received during the day on the shelves.
01:00 - very light sleep. A tooth that has not been healed in time or a knee injured a long time ago can wander and will not let you fall asleep until morning.
02:00 - all organs are resting, only the liver is working with might and main, cleaning the sleeping organism from the accumulated toxins.
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03:00 - complete physiological decline: blood pressure at the lower limit, pulse and breathing are rare.
04:00 - the brain is supplied with a minimal amount of blood and is not ready to wake up, but the hearing becomes extremely acute - you can wake up from the slightest noise.
05:00 - the kidneys are resting, the muscles are dormant, the metabolism is slowed down, but in principle the body is already ready to wake up.
06:00 - The adrenal glands start releasing hormones adrenaline and norepinephrine into the blood, which increase blood pressure and make the heart beat faster. The body is already preparing for awakening, although the consciousness is still dormant.
07:00 is the finest hour of the immune system. It's time to warm up and get under a contrast shower. By the way, medicines are absorbed much better at this hour than at other times of the day.
An adult sleeps about 8 hours a day on average. However, it should be noted that the time required for sleep is purely individual for each person - the main thing is that after sleep a person feels rested. There are two factors that affect sleep time - age and genetics.
Genetics affects not only how much sleep a person needs, but also sleep patterns and waking times, as well as preferences for performing certain tasks at different times of the day. A very small percentage of people (about 3%) can be productive during the day, getting enough sleep in just six hours - this is what they owe to their genetics.
It is generally believed that older people need less time to sleep, but this is not always the case. On the other hand, there can be no doubt that, in reality, many of the problems of older people - physical or psychological - are caused by poor or insufficient sleep. And it looks like a vicious circle, because it is physical and mental illnesses that cause sleep disorders.
Dreams are color or black and white. Black and white dreams help you better understand yourself. Their effect lasts 2-3 weeks. When a person sees only black and white dreams, it means that he relies only on the mind. Dreams in which colors are present or completely colored reveal the fullness of human emotionality. The impression from them is stronger, but, despite this, a person, seeing such dreams, rests more. Their influence lasts much longer - about 2-3 months.
Experiments were carried out, during which it became known that if a person sees dreams in blue or green tones, then everything in a person's life is good and stable. If the dream is colored red, it means a sharp rise in temperature or some kind of disease. Black color indicates that a person will soon experience a nervous breakdown.
Adults usually dream of familiar people, and children - animals. In male dreams, three out of four characters are usually male, while women dream of both equally often.
Brain scans have shown that when a person does not sleep for 24 hours, the prefrontal cortex slows down, making it harder for us to finish a thought or look at a problem in a new way.
Experts say the most attractive sleep breaker is 24/7 internet access.
If five minutes is enough for you to fall asleep, then you clearly lack sleep. The ideal gap is between 10 and 15 minutes. This means that you are quite tired, but during the day you felt cheerful.
It is known that daily mini-naps (5 to 20 minutes) increase alertness, endurance, muscle memory and physical activity.
Interesting fact: while snoring, a person is not able to dream.