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Considering that only an estimated 10% of the world's population is left handed, there's a lot of intrigue surrounding the subject? Is being left handed genetic? Does your brain control left handedness? Fortunately, with all the advances we've made in science and medicine, we don't have to be left wondering about such things.
Nowadays, there's just a simple curiosity about "lefties", but that wasn't always the case. According to Medical Daily," History reveals to us that left-handedness was not accepted for a long time, considered evil and associated with the devil in some cultures. Even the word 'sinister' was derived from the Latin word 'sinistra' which originally meant 'left'."
Now that the stigma has faded, there have been numerous studies conducted to get to the bottom of left handedness vs right handedness. The most famous of which was a team of scientists from the Netherlands, the UK, and China pursuing genetic analysis that could possibly contribute. Their findings were pretty surprising,
"The motor cortex of our brain sends signals to the spinal cord, which allows the movement of the arms and legs. But when observing fetal development in the womb, research acknowledged that the preference of hand was already decided before the motor cortex and the spinal cord were even connected."
In that capacity, we can discern that left handedness (or even being ambidextrous) comes from genetic and environmental factors rather than basic development. The study continued, "The environmental influences may lead to enzymes bonding methyl groups to the DNA, which may affect and minimize the reading of the genes."
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