If you write with your left hand, hold chopsticks with your left hand, play ball with your left hand… All with your left hand, then you are left-handed
Many left-handed people are extremely inconvenient when using some tools, because most tools are designed for right-handed people at the beginning. For example:
Writing = challenge wrist flexibility
Every time I swipe my card into the subway station, the gate next to me opens with a “drip” sound
Some businesses have specially produced a left-handed keyboard for left-handed people
When lefties use such a spoon to serve soup, they have to make enchanting actions on the spot
The peeler is too dangerous
When a left-handed person opens a can, the probability of injury is higher than that of a right-handed person
For a long time, “are left-handed people smarter” and “do left-handed people need to be corrected” have often been discussed.
Left handers can be judged in the womb
According to statistics, left-handed people account for 10% of the world’s total population, that is, on average, there is one left-handed in every 10 people.
In the past, people often thought that it was only when children ate and painted by hand that they could see whether the child was left-handed.
In fact, the left-handed had already decided in the womb.
Institutions such as the Italian Institute of advanced international postgraduates and the University of Padua jointly carried out a study.
Researchers observed the ultrasound images of the real-time movement of the fetus at 14, 18 and 22 weeks with a time period of 20 minutes.
Nine years later, compared with the movement habits of these children when they grow up, the consistency rate reached more than 89%.
Researchers found that from the 18th week, fetuses began to use their grown-up “dominant hands” to perform movements requiring higher accuracy.
At present, we can determine that left handedness is not a disease and does not need to be corrected. However, the pressure from family, society and other aspects makes many left-handed people learn to “bow left and right”.
Experts said: many public facilities, rules and tools are designed according to the habits of right-handed people, which makes left-handed people appear clumsy and even depressed from an early age.
Science has proved that forced correction of left-handed people may cause irreversible damage to the brain. Many people will have stuttering, dyslexia or ADHD after correction.
Suggestion: a child’s intelligence has congenital factors, but the development and cultivation of the day after tomorrow are more important. If the child is left-handed, please don’t force them to correct.
Left handers are full of genius?
Tennis players McEnroe and Nadal are left-handed.
American professional tennis player John McEnroe
Spanish professional tennis player Rafael Nadal
It is said that many scientists are also left-handed, such as Madame Curie and Newton.
Left: Marie Curie Right: Isaac Newton
Are left handers really smarter than ordinary people? In fact, scientific research shows that there is no significant difference in IQ between left-handed and right-handed people. Although there is a division of labor between the left and right brain, the two are not antagonistic. Both language and reasoning need the cooperation of the left and right brain. In fact, the world is more right-handed celebrities, but the label of right-handed people is easy to be ignored by everyone.
The left brain is the “rational hemisphere” in charge of logical thinking, and the right brain is the “artistic hemisphere” in charge of image thinking. Therefore, left-handed people often have the following advantages:
Strong spatial imagination. Before you write or draw, you have a formed image in your mind.
Strong sense of direction. Left handed people can grasp the position intuitively.
In sports, left-handed people react faster and their bodies are more flexible.
Having a talent for painting. Since childhood, he has a high ability in graffiti and drawing.
Having better pressure adaptability. High EQ.
Oxford University: left handers have a lower risk of Parkinson’s disease
After analyzing the genomic information and chirality of nearly 400000 volunteers and the detailed brain imaging of 9000 of them, the research team of the University of Oxford found that some chirality genes and mental disease genes also overlap.
The analysis showed that the left-handed gene was positively correlated with schizophrenia and negatively correlated with Parkinson’s disease.
In other words, people with the “left-handed” gene have a slightly higher risk of schizophrenia, but they are less likely to suffer from Parkinson’s disease than right-handed people.
Compared with the straight-line thinking of right-handed people, left-handed people are better at comprehensive thinking. We can exercise the ability of left and right bow and develop in a balanced way.
When writing with your left hand, find the most comfortable writing posture, sit on the right side of the table, make the upper right corner of the paper higher than the upper left corner, and put the desk lamp and stationery on the right.
When using the mouse, you can set the “mouse” item in the computer “control panel” and switch the primary and secondary buttons, so that the left and right mouse button functions can be changed and used more smoothly.
You can consciously brush your teeth and do housework with your right hand to exercise the flexibility of your right hand.
Take things with your right hand, use some simple tools, pick up the ball and practice the function of your right hand.
Test whether you have left-handed genes
Japanese scientists have sorted out a standard to define left-handed people. Compare the following tests to see if you have left-handed “genes”.
Left handed gene test
In the 10 basic living habits of writing, holding chopsticks, throwing things, brushing teeth, using scissors, striking matches, wearing needles and thread, using hammers and other tools, holding rackets and washing your face with towels:
If they all use their left hand, they must be left-handed.
If the first six items use the left hand, the last four items can be defined as left-handed even if they all use the right hand.
If 1 ~ 5 of the first 6 items use the right hand, the person’s two hands have no fixed deviation.
Interested friends might as well use this method to do a small test to see if they are left-handed, or a potential “invisible left-handed” who has been corrected since childhood.
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