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Let's talk about lefties.

22/03/2017

There are more skilled in the world than left-handers, and so far the unknown cause behind this situation has been the product of innumerable myths and superstitions that seek to disadvantage a left-handed minority.

Researchers at Ruhr University in Bochum, Germany, published a scientific article in the eLife magazine that indicates that tilt to one side or the other develops in the womb in the spinal cord and not, as was often believed, in the Brain, which is also divided into two hemispheres.

Although it was already known that human body movements begin with an order to the cerebral cortex through the spinal cord, the study highlights that a fetus begins to develop genetic differences according to its preference for the left or the right at eight weeks of Gestation, period in which both parts of the body are not yet connected.

In conclusion, the spinal cord independently determines the brain's left-handed or right-handed inclination. However, the reason why some are left-handed and other rights remains hidden, as this is not predetermined, but develops over time.

Scientists believe that, ultimately, the spinal cord tilts on one side or the other because of external stimuli triggered by undetermined environmental factors.

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