Why do people catch colds more often in the cold season? Detailed answer

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Why do people catch colds more often in the cold season? Detailed answer

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Why do people catch colds more often in the cold season?

It has not been scientifically proven that the main cause of a cold is cold weather. Cold outbreaks in late autumn are more likely due to the fact that people, especially children, spend more time indoors, where it is easier for infections spread by airborne droplets to enter the human body.

Author: Mendeleev V.A.

Random interesting fact from the Great Encyclopedia:

Why do we get acne?

Nobody likes to have pimples or blackheads and it would be nice if we could tell you what causes them and what to do to avoid them. But the problem is not so simple. Both pimples and blackheads most often start in the hair follicles. The sebaceous glands produce a fatty substance that gets there. When the hair follicle becomes clogged and this fatty secretion collects, then what we call blackhead is formed.

Pimples are small, raised areas of the skin that often accumulate pus. But the cause of acne is much more difficult to explain than blackheads. They can appear for many reasons, including poor nutrition, imbalanced glandular function, or minor skin infections. Pimples can also be a sign of more serious skin disorders or even a symptom of a serious medical condition. Therefore, if a large number of acne appears on the body, it is necessary to consult a doctor. The doctor will try to find the cause of their appearance.

If the presence of acne is caused by some internal causes, then the use of some external medicines will not bring much benefit, but will only damage the skin. Acne should not be squeezed out, as this can lead to infection entering the body.

Many young people develop acne during adolescence, in which not only acne appears, but also pustules, cysts, and nodules. The reasons for this are very individual: in some cases it has to do with nutrition, and in others - the cause of this phenomenon may be the malfunction of the glands. A person who develops acne should see a doctor to determine the method of treatment.

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Random news from the Archive

Where the brain tickles 15.11.2016

Obviously, tickling somehow affects the activity of the brain. Indeed, several zones in the brain are triggered at the same time, and first of all, the somatosensory cortex, which perceives touches on the body. But it is precisely laughter and other tickling emotions that, as it has been believed so far, arise in the emotional centers, while the somatosensory area should simply process the physical sensations of touch.

However, as experiments by researchers from the Institute of Biology at the Humboldt University of Berlin have shown, ticklish laughter can indeed arise, roughly speaking, only from physical sensations.

Shimpei Ishiyama and Michael Brecht tickled rats - it may seem strange, but now there is already quite a lot of evidence that rodents are able to feel and enjoy tickling: animals return to the place where they were tickled In order to get a portion of the same sensations again, the reward system responsible for the feeling of pleasure is activated in their brain, and in the behavior of rats there are all the same characteristic manifestations of positive emotions that can be observed in other animal species. In the experiment, young males were taught to play with a person who tickled their backs and stomachs during the games, so that in the end the rats even started chasing the experimenter's hand and tickling themselves.

Naturally, the games ended with the implantation of electrodes into the brain, with the help of which it was possible to monitor the activity of neurons in the somatosensory cortex and, at will, stimulate them with electrical discharges. And it quickly became clear that these neurons, which should have responded only to mechanical stimulation, continued to be "active" even when the rat ran after the hand that had just tickled her, squeaking in anticipation of a new portion of tickling. And even more surprising was the fact that artificial stimulation of nerve cells that respond to physical tickling causes the same emotional and behavioral signs as natural tickling - in particular, the rats squeaked in a special way, making sounds that meant pleasure and joy.

In other words, at the neurobiological level, the tickling response arose only from "mechanical" nerve impulses and without the participation of ordinary emotional neural circuits.

Along the way, it was possible to show that susceptibility to tickling depends on the emotional state: when rats were placed in an open place and illuminated with bright light - which was quite a stressful situation for them, nocturnal animals - they responded to tickling more weakly, and the activity of the corresponding cells in the brain was suppressed. .

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