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Left handed is a adjective which allows to refer to that linked to the left hand . Generally, the concept is used to qualify the person who has a natural predisposition to use the limbs on the left side of the body.

For example: "Diego Armando Maradona and Lionel Messi, two of the best players in history, are left-handed", “In ancient times, teachers forced left-handed children to write with the right hand”, “It's hard for me to use this clamp because I'm left handed”.

Is called left handed to condition left handed The left-hander is considered as a phenotype : a specific manifestation of a genotype according to a certain environment. He genotype , meanwhile, is constituted by the genetic material that an organism harbors in its DNA .

Left-handers, on a social level, are a minority : the majority of the population is right handed (has a tendency to use the right side of the body ). Those who can perform fine motor tasks with both sides are known as ambidextrous .

This situation places the left-handed individual is a disadvantage in many ways, since most of the tools , utensils and structures are designed for right-handed people. In some cases, special editions for left-handed people are produced (as is the case with musical instruments, to name a case).

For video game lovers, for example, it is normal that there is no option of adequate control to the predisposition of each user, but all must adapt to a single scheme. When in 2006 the Japanese company Nintendo launched its console called Wii, opened the doors to a new era in which it would be possible to divide the controls into two parts, each of which can be used with either hand, something much appreciated by left-handed people.

Although in the past being left-handed had negative consequences on society, already from the student stage, one of the myths that are currently held regarding this laterality is that goes hand in hand with a intelligence higher . In other words, these individuals went from being considered delayed to gifted, but how much is true in this new conception of the left-hander?

It is worth mentioning that many simply cling to the list of left-handers throughout history, such as Leonardo Da Vinci, Aristotle, Darwin, Newton, Marie Curie, Einstein, Bill Gates, Joan of Arc and Marilyn Monroe; Of course, Hitler, Bin Laden and Vladimir Putin are also in that cast, which is not enough reason to go from despising to admiring left-handers, but it is necessary to investigate their true relations with the developing intellectual.

One of the most common statements is that left-handed people use the right hemisphere of the brain more than right-handed people, and that this has a better performance of the functions Space However, scientific evidence has not been satisfactory to support it.

With regard to the performance of left-handers in the plastic arts, music or exact sciences, among other areas, the examinations carried out so far have not collected enough results to ensure that the right-handed are below. In sports, on the other hand, many of the leading figures worldwide are left-handed ; whether or not there is a connection between physical ability and laterality , this data cannot be denied at the statistical level.

In the context of the politics , it is called left-handed - usually in a derogatory way - the subjects with left ideology (which focuses on the social equality ): "I will not vote for that lefty", "The mayor speaks as left-handed but rules as conservative".

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