What Is Levator Ani Syndrome?

Left-handed, also known as "left-handed", refers to people who are more accustomed to using the left hand. In daily life, left-handers constantly encounter problems that require a lot of energy to solve. The experiences of left-handed children show great differences in drawing, writing and reading.

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A proposal to "focus on left-handed education" has been widely reported in the media. The bill calls for respect for students right to use their left hand in daily education and equip them with teaching methods adapted to left-handers

Lefties in the strict sense are very rare. First of all, hand movements include

Maybe we can leave the medical problems to brain neuro and cognitive behavior experts to study. However, here is a list of things that have been proven to excite supporters:

1. In some ways, there are always unique ideas that are different from others. Left-handed people often think of images before they write or draw. Many left-handed people also find ways to reorganize piecemeal data that cannot be backed up into a page of pictures, and then they are carried back. Just like the father of modern architecture, Bruliski, in the 14th century, he was able to propose digital figures to illustrate how to build the Florence Dome Cathedral. "I have figured out what it will look like when completed." Bidder. Some people think that this ability explains why many left-handed people are outstanding in engaging in space and art matters.

2. Strong ability in mathematics, visual perspective, and space is conducive to the development of mathematics and architecture. A 1990 Annet & Manning study has found a correlation between right-handed people and lack of mathematical ability.

3. Right-handed people who have close relatives (such as siblings) are left-handed.

This is the current mainstream school and was widely recognized at the turn of the nineteenth and twentieth centuries. Phenomenologically, the dominant hand is a human

The tolerance of left-handed people varies greatly among different ethnic groups.

Generally speaking, the Eastern nations are more discriminatory towards left-handed people and often take more severe measures to correct them. It is said that in ancient times, left-handers were not understood. In some languages, the word "left" can be interpreted as "clumsy" or "less sophisticated". Residents of some primitive tribes in Africa often stubbornly confessed that his wife prepared food with her right hand, and the intention was self-evident. Legend has it that the practice of wearing a wedding ring on the left hand means avoiding evil desires. It is also reflected in Chinese that people are accustomed to the right as the top, and the left is always associated with some negative and derogatory concepts, which means "bias", "evil", and "wrong", such as "the left side of the door" and "left throat" "Disagreement" means opposite opinion, "move left" means demotion, and "move left" means the poor.

In the West, left-handed people were considered "disabled" for some time. As everyone knows, many celebrities are left-handed, such as big beauty

Many people think that "left-handers" are smarter because they see that many household names are "left-handers." For example, painter Da Vinci, comedian Chaplin, sexy actress Marilyn "Monroe, natural scientist Einstein, Microsoft founder Bill" Gates, etc.
Modern brain science believes that the left brain is the "rational hemisphere" in charge of logical thinking such as words and numbers, and the right brain is the "art hemisphere" in charge of image thinking such as imagination and music. Because of the phenomenon of cross-command of the nervous system, people who have an advantage in the left brain usually use their right hands, and people who have an advantage in the right brain are generally "left-handed."
So, is "left-handed" smarter than "right-handed"? In fact, there is no scientific basis to prove this claim. A comparative study of the IQs of the two individuals found no significant differences. In fact, in addition to the above "left-handed" celebrities, more celebrities are still "right-handed." Of course, the "left-handed" does have certain advantages. For example, in face-to-face sports, "left-handed" people have a faster reaction speed than "right-handed" people, but their physical coordination and balance capabilities are slightly worse. Easy to wrestle.
In short, both "left-handed" and "right-handed" have their own potential and a bright future. We can be more active on the hand we use less, which is also beneficial to the development of brain potential.
Parents need to be reminded whether the child is "left-handed", the tendency can be seen when the child is about two years old, and it will be basically stereotyped by the age of three or four. This is also the critical period for the child's physical and mental development. If the child is forced to "change hands", the child will be in a state of frustration and helplessness, which may easily lead to stuttering, nervousness, emotional anxiety, and inattention.

August 13, 1975, United States

In 2013, Lin Pan founded left-handed Chinese public welfare platform. By disseminating some advanced educational ideas, we can dispel the misunderstanding of left-handers. To create an inclusive education atmosphere for left-handed students and to show humane care.

Statesman

He Xu

Summary

In daily life, the left-hander constantly encounters problems that require him to spend a lot of energy to solve. Let's take a look at the experience of left-handed children, who have shown huge differences in drawing, writing and reading.

Way of thinking

Left-handed people are good at integrated thinking and holistic thinking. Such thinking often develops the main line and the side branches at the same time, which is intricate and orderly. This is more complicated than the right-handed thinking of straight lines, because this kind of thinking processes many information and events simultaneously. And build complex relationships. This multidimensionality can express more than language and logic.

The way of thinking affects the ability to express, because "our language is straight, it just proceeds word by sentence, and cannot form a complex whole. Logical-linguistic thinking generally refers to thinking that can be carried by language. No doubt, the right hemisphere There is also logical thinking, but the complexity of this thinking greatly exceeds the carrying capacity of the language. "

The abstract thinking ability depends on the left hemisphere of the brain. The right-handed left hemisphere is dominant, and its abstract ability and logic are obviously stronger. In contrast, left-handed people often have excellent artistic thinking and good

Earlier, we had a general understanding of left-handers. Here we analyze the four types within the left-handed population. The reasons for the formation of left-handed people are different. Based on this, left-handed people can be divided into congenital type, acquired type, pathological type and pseudo left-handed tendency type.

Congenital, left-handed

Genotype, which is inherently left-handed. This type is the most basic type. This type of person has a left-handed tendency from the beginning, and he is born left-handed. Some of them were transformed into right-handers, and some were fortunate that they had not been transformed.

Acquired type

A person has lost the right hand in an accident or an illness, or suffered left brain damage due to cerebral hemorrhage or brain tumors, resulting in right-hand movement disorders, so he must learn to use the left hand. Thus, one such person is considered to be forced to become a left-handed person the day after tomorrow.

Pathological left-handedness

This is generally the case for pathological left-handed people. The left hemisphere of the brain has been disturbed since birth, so the right hemisphere has to do most of the work. The cause may also be that the corpus callosum, which is located between the two hemispheres, is responsible for the connection between the two hemispheres, resulting in dysfunction in the left hemisphere.

Pseudo-left-handed

Pseudo-left-handed tendencies are right-handed people who have been transformed into left-handers. This type is less common. In this case, the reason for transforming right-handed people into left-handed people was neither disease nor disability. For example, if the child's right hand is nervous when drawing or writing, the teacher may tell him that he can try to use the left hand, so the situation of pseudo-left hand tendency may occur.

When discussing the special performance of left-handed people, people tend to focus on the left hand. In fact, not only the left hand, but people should also notice that other parts of the left-handed body are also dominated by the left side. This applies to:

Ear / foot and leg / eye / vocal cord / tongue / taste / venous / rotating side / tactile

If a person merely uses the right hand first, it does not mean that his entire right body has an advantage.

It must be considered at the same time that the hands and feet are controlled by the cross of the cerebral hemispheres on the opposite side, but some organs, such as the eyes, are controlled by both hemispheres of the brain.

Today, people no longer simply view left-handers as the opposite of right-handers. In fact, the distinction between the two is more complicated than imagined. The division of labor in right-handed brain regions is clearer and stricter, while the division of labor in left-handed brain regions is relatively vague. This has many special meanings. For example, after a stroke, left-handed people are more likely to recover than right-handed people, and it is easier to regain some of their lost functions. Left-handed people are an irregular variant of human beings, and their special talents will continue to be discovered.

Lefty in the female and male population

Are women more left-handed than men? On the surface, this seems to be the case. Generally speaking, women's intuition is indeed better, their logical thinking ability is worse, they are more compassionate, and they have the ability to manipulate, and all these functions are related to the right hemisphere of the brain.

But whether the left-handed tendency is really related to gender has not been able to get the final answer. This is because it is quite difficult to obtain the exact gender and number of left-handed people, because it is not marked whether they are left-handed or not when registering the population. Moreover, the difficulty of statistics is multifaceted: firstly, left-handed tendencies have different degrees. If the degree is shallow, people are not easy to detect it. Secondly, because society still has prejudices, so many left-handers still hide their nature. Therefore, we can only say that the proportion of left-handed people in the total population fluctuates between 1% and 50%.

But one thing is for sure-left-handers will gradually increase and right-handers will decrease. In Germany, since the 1970s, left-handed tendencies have not been forcibly altered except in Waldorf private schools. People have shown increasing tolerance for lefties. As a result, the proportion of left-handed people will increase.

A spot check showed that the proportion of right-handed children in 10-year-olds was 15% lower than in 80-year-olds. This also shows that in the future, the proportion of left-handers will definitely increase.

In addition, a series of studies have shown that the proportion of left-handed people does not differ significantly between the sexes. But there are other surveys that show that males are 1% to 5% more left-handed than females.

Later surveys may indicate that this unilateral tendency, that is, the dominance of one side of the body, is relatively less prominent among women. The difference between the left and right hemispheres is weaker for women, or women can better unify the talents and abilities in the two hemispheres. Facts have proven that men show strong laterality in both language and spatial abilities, while women have strong bilateral symmetry in both language and non-verbal abilities.

From the perspective of evolutionary history, the above research results are completely understandable. Because women's "normal" daily life almost does not allow special tendencies in both sides of the brain hemisphere. Until today, in most cultures, women have to take care of complicated tasks-managing the family, taking care of children, and in addition, Provide a diet for the husband who is "qualified" to choose a unilateral tendency.

However, whether this can prove that women are more prone to left-handers still needs to be studied slowly.

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