While we are sleeping, our body continues to work actively. While some processes are activated in our body, the others processes are stopped. We cannot control the body during sleep period, but many things occur while we sleep.
1. Nose can "sleep"
Pablo Picasso, " Head of a sleeping woman"
"I am dead above the ears" - confidently declared by lovers of sweet sleep. In fact, harsh sounds, regardless of their nature, can wake up the man from any stage, even from the deepest stage of sleep; an alarm clock is based on this principle. However, and this is interesting that even the most active odors are perceived in a dream, not able to awaken the sleeping person, even if the brain identifies them.
Most likely that while you are sleeping, the information obtained by olfactory organs, gradually merge with the image, projected by the brain, and as long as your partner is desperately running around with a cup of coffee, you just continue enjoying your own cup of coffee at the top of the Eiffel Tower in your dream.
Not pungent smell of pyridine or a pleasant smell of mint that were used in the experiments by scientists from Brown University (USA) did not awake the participants. This explains the high percentage of deaths of sleeping people in the fire. The person simply does not notice an intense burning smell.
2. Movement while sleeping
John Singer Sargent "Studies of Sleeping Figures for 'David in Saul's camp"
It would seem that the supine position and no needs for physical and mental activity must be expressed in a state of absolute relaxation. In fact, our body continues to respond to external stimulus such as light, sound, temperature in a room.
Because of the gravity, some areas of the body, in contact with the bed surface, are exposed to the maximum pressure. This is why there is a need to change the position several times during sleep. On average, healthy person makes about 25 different body movements within a few hours of sleep.
70% of such movements adversely affect the intensity of sleep, not allowing us to achieve the deepest phase, which is essential for a good rest and restore our energy. In the stage of deep sleep most of the muscles are relaxed, but not paralysed and holding the sleep person from excessive activity. These processes can explain the danger of intoxicated sleep, when a person does not change sleeping posture during several hours. This is fraught with increased pressure on certain areas of the body and may lead to neuropathy.
3. Eyes of a sleeping person
Domenico Fetti "Sleeping girl"
Eyes roll up in the initial stage of sleep and this is eliminating exposure of the light on the retina, even with half-open eyelids. By the way, you can determine what phase of sleep a person has by the eyes.
In the phase of deep sleep eyeballs move slowly under the eyelid due to active blood flow to the muscles and internal organs. The phase of the deepest sleep is also characterized by slow movements of the eyes, but the heart rate and the general rhythm of life also decrease. During REM sleep stage blood supplies the brain of a sleeper and activates thought processes. At this stage we see the colorful pictures of dreams and the eyes move in accordance with them. These processes are universal for both human and animal; watch the sleeping cat and you will see what trajectory sparrow has in her dream today.
4. Sleep on it
Marie Francois Constance Mayer-Lamartinere "The Sleep of Venus and Kupid"
The brain, of course, does not turn off during our sleep, but only goes to another mode of operation and continue to monitor the processes occurring in the body. Brain cells reduce the responsiveness to peripheral stimulus and begin work on the ordering and classification of the information obtained during wakefulness.
This information is sorted, compared with existing and sent for storage in the appropriate areas of the brain. Constant lack of sleep takes time for processing that information, resulting data are confused, and the person begins to complain about the state of the memory.
In 2004, German scientists from the University of Luxembourg taught a group of volunteers to solve math problems at a certain level. Participants were offered about 100 tasks. After the first part of the practical training a half of students was offered twelve hours of sleep, while others were awake.
In the second part of the seminar only 23% of awoken participants offered the optimal solution of problems, while in the group of those who managed to get some sleep, the figure was 59%. This proves that during sleep, information will be compared and ordered, allowing the optimal solution of the problem, which the waking man does not even know.
5. Purification of the brain
Nicoletta Ceccoli "Beedream"
There are two modes of brain activity: wakeful state, when a person is actively thinking, logically thinking or can take decisions and sleep state or "wash" state when liquor wash spaces of nervous tissue while we sleep.
Toxins concentrated not only in the kidney and liver, but in the cerebrospinal fluid of the body. During the sleep, glial cells that surround and support neurons of the brain, shrink, thereby increasing the intercellular space and enhancing of the fluid flow from the brain, removing toxins. While we sleep, lymphatic system increased its activity about 10 times. If it does not, then the existing toxic proteins in the brain formed plaques, leading to the development of Alzheimer's disease and Parkinson's disease. Unfortunately, pumping fluid through the brain tissue requires a large expenditure of energy and it is incompatible with information processing, so live organisms cannot exist without the appropriate long sleep.
6. Height and weight
Arsen Curbanov "Time when dreams come true"
"Fly means you grow taller!" - My mother said when I was a child. Good news, you do not have to experience flying in the dream state, and if you measure your height just before bedtime and immediately after waking up, in the second case, you may find "extra" 0.5 -1 cm.
During sleep, the pressure on the intervertebral discs is reducing, they are moistened, stretched and take up more space, without being subject of the body pressure.Thus, the spine is straightened, but returns to the initial parameters in the evening. In sleep, the hormone leptin is also produced, which reduces the feeling of hunger, while at the lack of sleep you get active production of the opposite hormone, ghrelin, which increases your appetite.For active work of the former hormone, you need to sleep at least seven hours, while lack of sleep (4-5 hours per day) actively discourages to lose excess weight, even during tough diet and physical exercise.
If you have overeaten before bedtime, it is best to sleep on your right side; it will allow the stomach and intestines to handle the load. Of course, you should avoid eating 3-4 hours before bedtime, and then you are guaranteed health benefits.
7. Anti-aging effect
Giorgione "Sleeping Venus"
Sophia Loren claimed that the secret of her beauty is good sleep, and we do not doubt the veracity of this statement. While we are sleeping, body temperature and blood pressure decrease, the heart muscle relaxes and restores, the body goes into conservation mode and energy storage.
In addition to these processes, the production of collagen increases, a protein that strengthens blood vessels and makes the skin elasticity. Because of these properties, collagen is often used in cosmetic procedures and creams, but nothing can replace the natural production by our body. For this reason, the cream with retinoid, which support the production of collagen, is recommended to use before bedtime. In addition, the tissues of the body are recovered in sleep, but production of growth hormone, can be inhibited by reduced level of insulin. Therefore, if you plan to get all the advantages of sleep, you should try to avoid a late dinner.
During sleep, the cleansing of skin cells accelerates (especially in the first half of the night), oxygen metabolism improves, the level of toxins reduces and the strength of the body tissue increases, which leads to a wrinkles decrease and increasing of elasticity and visible anti-aging effect.