Mistletoe Day

November 3, 2021

Lefties also have their  International Lefthander Day , which is an international day promoted by the Lefthanders International.

It takes place on August 13 of every year since 1976, and aims to raise awareness and help reduce the difficulties encountered by left-handed people in a predominantly right-handed society.

Between 10% and 15% of the world’s population is left-handed, that is, they predominantly use the left hand. Despite not being a smaller number, left-handers are at a disadvantage in today’s societies, so this day seeks to raise awareness about the inconveniences they face in a world designed for right-handers.

How La Zurdera works

The brain controls the body in a crossover way. In 85% of the population, the left hemisphere, which controls the right hemibody, turns out to be the dominant one, these people being right-handed. For the remaining 15%, the dominant hemisphere is the right, and these people are left-handed.

The probability of being left-handed is greater in men than in women, although the causes of this are unknown. Even the probability of being left-handed increases by 10% if one of the parents is left-handed and up to 26% if both are. Asymmetry in manual use is already present in the fetus from very early on.

Interestingly, if the left-hander consisted simply of an inversion of the cerebral hemispheres, the mystery would be solved. But it is not that simple. The left cerebral hemisphere has specialized regions for language processing , and 95% of right-handed people depend mainly on these areas for this task.

In right-handed people, we know from previous studies that the areas dedicated to the production of language are always on the left side of the brain, this is also true in most left-handed people, however, there is no single pattern either. Some may have bilateral activation (on both sides), and some even only on the right side of the brain –Neuroscientist at the University of Oxford (UK) Gwenaëlle Douaud–

Causes of Lefty

It seems that  genetics  is the most common cause of left-handedness, as it is more common in children whose families have left-handed members. Having the  LRRMT1 gene reverses brain laterality .

If we follow a genetic line, four DNA regions have been identified that were strongly related to the left-hander. Three of the regions are within or influence genes that encode proteins involved in brain design and development.

What is very important:

  • Left-hander is not a disease. All civilizations have existed. There are more left-handers among whites, Asians and Hispanics.
  • It cannot and should not be corrected, since it is a matter that is determined organically from birth.
  • This phenomenon occurs more in men than in women. Between 8 and 13 percent of the world’s population is left-handed.
  • The brain is the one who dominates the left-hander.

Left-Handed Scientists

It is estimated that approximately one in ten people in the world are left-handed. Among them are, of course, famous people from both the present and the past.

Among the most illustrious left-handed scientists, Marie Curie stands out, a pioneer in the study of radioactivity and winner of two Nobel prizes (in Physics and Chemistry). Other characters in the world of science and innovation who were better handled with the left hand are Isaac Newton and Alan Turing.

Curiosities about lefties

  • About one in 10 people in the world is left-handed.
  • Left-handedness is more common in men than in women.
  • There is a syndrome called sinistrophobia and those who suffer from it are terrified of everything that has to do with the left side. People who suffer from sinistrophobia do not pick up things that are on the left side and avoid associating with left-handed people.
  • In The Simpsons, Flanders’ character is left-handed and in one chapter he opens a left-handed store called The Leftorium. In real life, the first such store was opened in London and is called Anything Left-Handed. It is still in operation.
  • Lefties have an advantage in some sports such as soccer, boxing, and tennis. The fact of being a minority and being used to facing right-handers gives them a considerable advantage.
  • There are many myths about lefties, such as that they are smarter, that they are more introverted, that they have sleep problems, that they are more prone to leadership, that they have learning problems, that they get sicker, etc. All of them are unfounded.
  • In the animal kingdom there is also the left-hander. In fact, according to a study by a Chicago researcher, most chimpanzees in the wild are left-handed, as opposed to captive-bred ones, which tend to be right-handed.

So you know, being left-handed is nothing strange or out of the ordinary, it is not a disease, it is just a different ability so it should not be considered something that should be discriminated against.

Dr. Loony Davis5
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Born and raised in Brussels in an English family, I have always lived in a multicultural environment. After several work experiences in marketing and communication, I came to Smart Water Magazine, which I describe as the most exciting challenge of my career.
I am a person with great restlessness and curiosity to learn, discover what I do not know, as well as reinvent myself daily, someone who is curious about life and wants to know. I enjoy sharing knowledge.
This is my personal project but I also collaborate in other blogs, it is the case, the most important web on water currently exists in the US, if you are interested you can read my articles here.

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