About 90 of humans have a right handed hand, so why do humans prefer to use their right hand?

According to statistics, about 95% of people are more accustomed to using the right hand to carry out work, and the reason why we are accustomed to using the right hand is because this is a habit that is slowly developed in long-term labor. <>

In the Stone Age, human beings are in groups, holding food in their hands or fighting with wild beasts, when fighting, human beings instinctively use their left hand to protect their hearts, and the heart is on the left side, so they will use their left hand to protect, so for a long time the phenomenon of using the right hand has become a habit now, and this habit has also become the current heredity, in everyone's body, all parts are crossed to the brain nerves, The right hand is managed by the left hemisphere of the human brain, while the left hand is managed by the right hemisphere of the right brain. Because everyone often uses the right hand, the sensitivity of the left hemisphere in everyone's mind is higher than that of the right side. This makes everyone use the right hand often, and in this process, the right hand is constantly exercised, so the strength is gradually greater than the left hand.

For human beings, the social culture and environment have a great influence on the development trend of human handedness, but for some individuals, the impact of the environment is not particularly significant, for example, if their parents are used to using their left hand, then their children are likely to be more accustomed to using their left hand to work. This is a hereditary form of modification. Because most people are still more accustomed to using their right hand, in the long run, human beings are more accustomed to using their right hand for work and study.

In human civilization, some people are biased against left-handers, because many tools and programs are designed to facilitate right-handers, often ignoring the difficulties that these left-handers will suffer, and in many families, parents will force their left-handed children to use the right hand.

The main reason is that the frequency of the right hand is relatively high, which is also a habit formed in the process of human evolution, and also because the left brain of human beings is more developed.

Because it is more convenient, we gradually develop a habit to better improve our work efficiency, and the power of using the right hand is also relatively large.

This is mainly because our ancients gradually formed a way of labor in the long-term labor, and this is also to deal with some things efficiently.

Most people in the world are used to using their right hand, and only a few people are used to using their left hand for two reasons, one is because of genetics, and some people are used to it.

If we see people eating with their left hand in a restaurant, they will always look twice and pay more attention, because most people in the world eat and write with their right hand, and it will be more convenient to use their right hand, but there are still a small number of people who eat and write with their left hand and do a lot of things with their left hand. It will be more convenient for them to use their left hand, if you have a left-handed person who eats, writes, and is accustomed to using the left hand, then you carefully observe, maybe his parents or his grandparents, one of them is also used to using the left hand, so the habit of using the left hand is also because of genetic factors, because their relatives have such a habit, so it is inherited to the next generation, and the next generation is also used to using the left hand. <>

If you don't find that among your relatives who are used to using their left hand, there are also people who are used to using their left hand, and it may be because they are used to using their left hand when they are learning various abilities, for example, when they are just learning how to eat and how to write, they have been using their left hand to eat and write, and slowly form a habit. And the habit is very difficult to break, over time for them, with the left hand is the most convenient, and it is also difficult to break this habit, so if your baby is learning to eat, write, find that he uses his left hand to eat, write, try to let him get rid of this habit at the beginning, if he eats and writes with his left hand for a long time, it will be difficult to break this habit. <>

When we see people who are used to using their left hand, many people will think that they are smarter, because everyone thinks that they are used to using their left hand because their right brain is more developed, while we ordinary people are used to using the right hand, so our left brain is more developed and uses the left brain more. Most people who use left-handed habits are also able to use their right hands, but they are not used to it, so many people think that people who use left-handed habits are more developed in both left and right brains, so they think that people who use left-handed habits will be smarter. <>

Because most people have a more developed left brain, it controls the movement of the right hand, and a few people with a developed left brain are left-handed.

It is because most people's right brain is well developed, but the left brain is not. Those who use their left hand. In general, the left brain is well developed.

Because this has always been a custom of everyone, if you use your right hand, you think it is the right posture, but if you use your left hand, it feels a little left-handed.

No one has to use the left hand or the right hand, this is the result of millions of years of human evolution, the vast majority of people use the right hand, not only a habit, but also a product of evolution.

In addition, the left brain controls the left hand, and the right brain controls the right hand, which is also caused by a habit. The right hand is more convenient and more conducive to production and daily work.

If the heart baby says, it is that people should use their hands to protect the heart and the important organs of the body, and the right hand is responsible for attacking and hunting and production labor, so the formation is based on the right hand, and the left hand assists both hands to go hand in hand, so that it is more perfect.

Labor is the most glorious, regardless of the left and right hands.

I think this has always been a habit, and then passed down from hand to hand, and it has been passed down like this, in fact, if people use their left hand since birth, I think it can be used very well, like when a foreigner writes, the left hand can also be used, and the right hand can also be used.

It is generally believed to be related to the differentiation of the left and right brains.

Chimpanzees are single-handed, with left-handed and left-handed preferences, but the number of left-handed and right-handed orangutans is equal throughout the population.

So in the distant past, our common ancestors, the Chadian Shah, may not have been mostly right-handed.

Later, the human brain evolved, and there were differences between the left and right hemispheres.

The left and right hemispheres control the contralateral motor function respectively, and receive and analyze the sensory information of the contralateral transmitter, that is, the left brain tube is right-handed, and the right brain tube is left-handed;

At the same time, the left hemisphere is mainly responsible for functions such as language, writing, and computing, while the right hemisphere is mainly responsible for functions such as graphics, **, and spatial perception. The left hemisphere is known as the "dominant hemisphere" because of its close relationship with important speech functions in mental activities.

In the past, when the language was simple and the learning was simple, there was not much difference.

However, as human sociality intensifies, learning and group collaboration become more complex, and the connection between movement and language becomes more and more obvious.

Together, throw! Most people become more right-handed.

Other animals also have a preference for claws, which are also thought to be related to the brain, although there is little difference between the left and right brains.

No one stipulates that you must use the right hand, because generally speaking, the left hemisphere of the human brain has a stronger ability to control movement than the right hemisphere, and the left hemisphere controls the right half of the body, so most people are used to using the right hand. Of course, there are some special people whose right hemisphere is stronger than the left hemisphere, and they are more accustomed to the left hand than the right hand, which is what we often call left-handedness.

The root cause: The emergence of language causes humans to be right-handed, and behind it also falls on the frequency of the gene PCSK6. Since the topic is to trace back to the roots, let's start with the most fundamental question, why is the right hand dominant.

Theoretically, humans should be right-handed.

For example, in our close relatives, chimpanzees are well-balanced.

Of course, there are some differences in this balance, for example, wild chimpanzees prefer to use their left hand, while chimpanzees in zoos prefer to use their right hand, for reasons unknown, one consideration is that wild chimpanzees prefer to get their own food, so they prefer to use their left hand to hold sticks and branches to find ants to eat. Chimpanzees in zoos, on the other hand, are fed food by humans, so they are less likely to use tools and may have some imitation learning from humans, such as the acceptance and understanding of human language.

But at least from these primates, left-handed balance should be common.

But why do humans become right-handed?

One possibility: language.

Throughout human history, people seem to have preferred to use the right hand over the left hand. There is evidence that as early as 7 million years ago, our ancestors tended to use their right hands for various tasks, such as throwing stones or picking berries!

Why do we prefer to use one hand?

Sticking to one hand while writing, drawing, or pitching can help you do these tasks better. It takes longer for the brain to learn how to do these things if it keeps changing hands, so the brain will tell us to prefer a certain hand.

Similarly, when kicking a ball, you may prefer to use one foot and the more you kick, the better that foot will be kicked.

When performing a task, we don't just like to use one hand and foot and not the other, we do the same with the brain. For example, the part of the brain that controls the ability to calculate and draw is also located on one side of the brain.

Amazingly, there is a correlation between the side of your hand that you write or throw a ball with that side of your brain that speaks. For example, if your right brain controls speech, you are likely to be left-handed, and vice versa.

This relationship between brain function and using that side of the hand seems to be the reason why people are left-handed.

Whether a person is left-handed or right-handed is not his personal choice. It is determined by a combination of parental genetics and personal experience.

Interestingly, even identical twins with identical genes do not always have the same dominant hand.

Most parents can tell which hand their child prefers around the age of two.

However, scientists can accurately determine whether a child is left-handed or right-handed even before he is born! By measuring which arm of the fetus still living in the mother's womb moves the most, it is possible to determine which hand you prefer at birth.

There have been some left-handed people who have been corrected, especially in our country, when they were young, their elders often forcibly corrected left-handed children because of their prejudice against left-handers. Actually, this is completely unnecessary. In a right-handed world, left-handed children may encounter some inconveniences, such as the fact that everyday scissors are designed for the right hand unless you buy them specifically.

But there is no need to forcibly correct left-handed children, and there are many left-handed people who have made outstanding contributions in various fields.

The most frequently mentioned hypothesis is that the heart is on the left side, and primitive people who are accustomed to using their left hand to protect their heart, and their right hand to do more complex work is easy to survive, so most people use their right hand. After a child is born, the use of the left and right hands is often random, and people will deliberately correct the use of the right hand. As a result, right-handers make up the majority of the crowd.

Because a lot of things have to be done with the right hand. It will be easier to use your hands. The strength of the right hand will be a little greater.

In the early stage of the evolution of human society, in the process of fighting, because our heart is located on the left side of the chest, it gradually evolved into a left hand holding a shield to protect itself, and the right hand holding a spear, responsible for attacking and throwing In the long-term evolutionary process, due to the increase in the scale and intensity of warfare, the right hand has been more and more valued and used, and has become the most important 'sharp hand' (limb dynamics concept, referring to the most important limb in movement, divided into right hand and left hand).

Personally, I still believe in this, throughout the ancient wars of China and the West, without exception, they are all right-handed attacks**, and left-handed protective shields

However, science is what it is, and there can never be only one explanation and one answer

Whether a person uses his right hand or his left hand is not innate, it is an ontogeny and can be changed. If there are accountants who are accustomed to using the right hand, for the convenience of work, they often practice using the left hand to plan the plate, so that the left side of the calculation, the right side of the writing, greatly saves time, improves work efficiency.

Because the right hand is very convenient for us to do many things, and many things are also designed according to the scheme of the right hand as the main hand, so as to promote our behavior of using the right hand more.

The heart of the human body is on the left side of the body, in ancient times, when human beings fought with other animals or races, they used to use their left hand to protect their hearts, and their right hands took ** and tools, and over time, their right hands became commonly used.

People are accustomed to using the right hand because the vast majority of people have a well-developed brain in the left hemisphere, which is a nerve problem that governs the movement of the right hand.

The main reason why people tend to use their right hand is because of an unchangeable habit that has been formed over a long period of time.