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Scientists identify genes associated with the left hand



Moreover, these genetic variants lead to differences in brain structure, which may mean that left-handed people have better verbal skills than right-handed.
While previous studies of twins suggest that genes are at least partially responsible for controlling hands, a new study by Oxford University researchers published in Brain is the first to identify which genetic variants separate left-handed people from the righteous.

Research can offer a potential link between left-handedness and superior verbal skills, said Akira Viberg, an associate at the University of Oxford's Medical Research Council.

"This raises the intriguing prospect of future study that leftists can have an advantage when it comes to performing verbal tasks, but it should be remembered that these differences were only considered as averages for a very large number of people and not all left-wingers will be alike, "he said in

. Additional studies need to be conducted to test this potential advantage, according to Gwenaëlle Douaud, co-senior research author and contributor to the Oxford Center for Integrative Neurosurgery. promotion.

"We have to consider whether this higher coordination of the lingual areas between the left and right sides of the left-hand brain actually gives them an advantage in verbal ability. For this we need to do a study that also has in-depth and detailed testing of verbal ability. "," She said.

Genetic regions

Funded by the UK Medical Research Council and Wellcome, a British medical research organization, researchers examined the DNA of 400,000 people, including 38,332 l vichari, from UK Biobank, a database containing volunteer health information across the country

They isolate four left-handed genetic regions; three of these regions are related to proteins that affect brain structure and development. specifically, proteins have been linked to microtubules, a component of the cellular scaffold, or to the cytoskeleton.

The cytoskeleton determines the structure of cells, as well as how they function in the body. Previous studies have demonstrated the influence of the cytoskeleton on "left to right asymmetry" in other species.

"Many animals show left-to-right asymmetry in their development, like snail shells twisting left or right," Dua said.

  Lions get a day

Analyzing the brain images of about 10,000 people studied, researchers found that genetic variants were related to left-handedness related to differences in the tracts of the white matter of the brain – especially tractors that connect the brain-related areas of the tongue.

Moreover, Duo told CNN, studies show that in left-handed people, "the left and right sides of the brain communicate in a more coordinated manner.

Left-handers demonstrate" greater synchronization of natural brain vibrations. you and these oscillations still happen when you are unemployed, "she said, a synchronization that happens" right back in the brain regions dedicated to language. "

  Scientists confirm the genetics of schizophrenia

[19659003] The study also indicated and the link between brain-related aspects of the humus and the likelihood of developing schizophrenia or Parkinson's disease.

Dominic Furnis, co-senior author, along with Duad and an associate of the Department of Orthopedics, Rheumatology and the musculoskeletal system of Oxford , told CNN: "It has long been known that there are slightly more left-handed people in schizophrenia than the general. In contrast, there are few fewer left-handed people with Parkinson's than the general population. "

A new study, according to Furnice," suggests that these diseases, together with airtightness, are the product of fundamental differences in brain development, some of which are driven by genes. "

However, the researchers emphasize that the relationship between herpes, schizophrenia and Parkinson's shows only a correlation, not a cause and effect relationship, and that the difference in the number of people with the disease is very slight.


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