Genetic Components Related To Left Handedness – A Study

A recent study by scientists reveals about regions of the Human DNA and their association with left handedness. These regions are connected to the brains language related features. An earlier study around handedness had revealed that genes were responsible for 25% of it but the type or name of the genes was unknown.

In India and across the world there were has been a lot of stigma and taboo around being left handed. But, today rarely anyone is of the belief or even discriminates between left and right handed people.

10% of the population in the world is known to be left handed and also includes many well-known individuals like Alert Einstein and Leonardo da Vinci amongst them.

The recent study was published in the journal ‘Brain’ and involved the participation of 40,000 people including 38000 left handed ones. After doing the genetic analysis, the researchers found that it was the DNA regions that linked to left handedness strongly.

As per the researchers the three regions are inside or are responsible for protein code of brain development and patterning. Proteins play a significant role in making microtubules which are scaffolding like building block and are responsible for guiding cell construction.

Microtubules are made up of long chained molecules making up the physical structure of the cells throughout the body also known as cytoskeleton and have the ability to respond to cell singals by quickly assembling and disassembling.

The scientists did study brain scan details of 9000 participants after analyzing their DNA samples. The findings indicate that in left handed people right and left side for brain that deals with language coordinate in a better way compared to right handed ones. These findings thus pave the path for getting deeper into finding if left handed people are better in tasks that involve verbal communication compared to the right handed ones.

Well, as per Gwenaelle Dououad, associate professor at the Wellcome Centre for Integrative Neuroimaging that it was apparently for the first time that they had been able to establish that in humans the handedness is linked to cytoskeletal differences in the brain.

*Sourced from Internet

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