Why do the hairs stand up when you don t understand the slightest emotion?

Fear, which is something that we all have, is a situation in which the patient has a strong and unnecessary fear of a particular object or situation, accompanied by significant anxiety and autonomic symptoms, and actively avoids it to relieve this uneasiness. Seeing the above **, it will make people feel frightened to see it all at once, but it is actually just a crab that crawled into this skull.

Let's take a look at the above one**, people with a phobia of giant objects will feel a little scared. Because people with a phobia of giants, that is, they are very afraid of huge things, and they will faint at the sight of ships, planes, and even large clouds. So when you see this Buddha statue above, you will feel a very frightened feeling in your heart, will you be so afraid?

Then we saw the above **, which also made people feel very weird. Because this was originally a ** taken in the classroom, but the girl in the middle, she already has two hands on the table, but the hand that tickles her feet, whose hand is this? If you think about it, it makes people feel scared.

And the above one**, it also makes people feel very scary. Because this is a common thing in our lives, this is a ** taken in the car, but we see a spider hidden in the light barrier. If we don't find out, then it could be a tragedy.

The last one**, you may feel a feeling of depression. "Abyssal phobia" is a type of phobia that, in general, has a lot to do with the patient's past experience of fear. People with such phobias often feel fear because they are afraid that they will not be able to escape from the situation they are in.

When we see the ** in the deep sea, we will feel a little scared, are you afraid?

Anemia, right? Because I haven't eaten breakfast for a long time.

Take time off to hang out and call a few more friends. Go for hi.

Sometimes it's when you come across your sensitive parts, and that's it.

You think it's chemistry, but I can't tell you how it works.

Why do hairs stand up when it's cold? It won't be hot on a hot day.

When we feel a chill, the tiny muscles at the base of the hair contract and stand up, causing ** to twist and form goosebumps. Therefore, mammals have this hairy property of using hair to create a layer of heat insulating air. Chills warm us up more by rapid muscle contractions.

When people are cold, it is because the erector pili muscle contractions, the pores become smaller, and the hairs stand up.

Because in the dermis, there are erector pili muscles, which can make the hairs stand on end.

When people are frightened, in the moment of nervousness, the sympathetic nerve in the autonomic nerve will suddenly excite, through the complex neuroendocrine action, the whole body trembles. Hair has an erector hair muscle attached to one end of the hair follicle, which is a smooth muscle, and its contraction and relaxation are not governed by people's will. When the sympathetic nervous system is suddenly excited by fright, the erector pili muscle will involuntarily contract under the action of neuroendocrine, so that the hair will suddenly stand up and appear goosebump-like.

And when you stabilize emotionally, it will automatically relax again. This must be something that everyone has experienced.

The pores are erected because of the erector pili muscle. Erector pili muscle activity is innervated by adrenaline and sympathetic nerves.

The erector pili muscle is a smooth muscle that can control hair, one end is connected to the connective tissue in the middle of the hair follicle, and the other end is directly connected to **, the erector pili muscle is not controlled by human ideology, that is to say, it is not that you can contract at will if you want to, but it is directly controlled by the human adrenaline and sympathetic nerves.

When a person is angry, frightened, frightened, or cold, the sympathetic nerves are excited, the adrenal gland level rises, and the erector pili muscle contracts, pulling the connective tissue on the side of the hair follicle, and straightening the hair that emerges from the scalp and tilts. Pores are usually erected in one of two cases:

1. When mental and emotional changes such as fear and fear occur, the sympathetic nervous system is excited, the level of adrenaline increases, the erector pili muscle contracts, and the hair stands erect, that is, the so-called hairy and goosebumps occur.

2. When in a hot environment, the excitation of the thermoregulatory center innervates the adrenal glands to increase the secretion of adrenaline and relax the erector pili muscle. Or in a cold environment, the excitation of the cold regulatory center innervates the adrenal glands to increase the secretion of adrenaline, enhance metabolic activity, constrict blood vessels, and contract the erector pili muscle.

It is the effect of "erector pililos".

Sometimes when I am frightened, or I hear what I like, I will unconsciously have a layer of "goosebumps" on my arms and thighs, and I feel that "hair" This reaction when our mood changes is the effect of "erector pili muscle".

Standing pilios", looking at the name, we can also roughly guess its meaning, which is the muscle that stands up "hair".

This "erector pililos", also known as the "erector pililois muscle", originates in the dermis at one end (the deeper layer**) and inserts into the hair follicle at the other end.

When the erector pili muscle is "tense", the hair in the hair follicle will be in an erect state; The ** around the pores will also be twisted due to the tension of the erector pili muscle, making our ** become like "chicken skin".

Whether the erector pili muscle is tense or not is actually innervated by "adrenaline" and "sympathetic nerves".

Let's talk about the "sympathetic nerve" that you haven't heard much about.

The sympathetic nervous system, which mainly controls the internal organs, cardiovascular system, and various glands; It is an important part of our "autonomic nervous system" and is constantly unconsciously regulating our bodily functions, such as heart rate, digestion, breathing speed, and so on.

Adrenaline is a hormone secreted by the "adrenal medulla", which will strengthen the secretion of adrenaline when we feel particularly excited, fearful, or when we are doing some activities.

When our mood changes, adrenaline is secreted, and the sympathetic nervous system also plays a regulating role, so that our heart beats faster, blood pressure rises, saliva is less, and erector pili muscles inevitably contract.

The same is true when the weather changes. When the weather suddenly gets colder, the body adjusts to make our heart beat faster and blood pressure higher, which inevitably requires "sympathetic" and "adrenaline".

As soon as these two "supervisors" are dispatched, the "erector pilos" muscles will also tense, which will cause our hairs to stand on end and goosebumps.

I can make my pores erect and swell at will, what's going on?

It's the instinct of the human body to be frightened or horrified by something that makes it unbearable.

It's not just hairs that stand on end. And there are some small pavilions.

That's when people make the subcutaneous fat accumulate quickly when it's cold, which plays a role in resisting cold.

But now people have evolved. There is no practical use for it.

Suggestion: In general, it is normal for hair to stand on end when agitated. After a while, it may be a phenomenon of sensitive conditioning, and obsessive-compulsive disorder is unlikely.

Not only do people get goosebumps when they are cold, but sometimes they hear harsh sounds and see disgusting and frightening things, and their hair stands on end, and they get goosebumps on their bodies.

Chicken bumps have obvious self-protection functions for animals with long hair. The soft fur of these animals stands up when it is cold, making the soft fur fluffy, which is better able to keep warm and cold. The ancestor of man, Australopithecus, was also full of hair, and the body hair of man has gradually degenerated during the evolutionary process, but the physiological function of goosebumps to keep out the cold has been retained.

This is a kind of psychological suggestion, and it should be okay to practice more. It's the same as a person who faints blood.

You are an intensive phobia ...

The cemetery is still a crematorium, if these two places are not, don't go to that place, there must be something bad for your health.