One of the most interesting human traits is that only about 10% of the world’s population is left-handed. However, the interest in left-handedness is not only because it is rare, it is because it tells us something about the human brain.
The reason why some people are left-handed remains a mystery to scientists. It has been found that it is not a single “left-handed gene” but rather a combination of genetics, brain development and environment.
What’s fascinating is that handedness is associated with brain organization. In most right-handed people, language is mainly processed in the left hemisphere of the brain. This is also the case for many lefties, but they are more likely to have language in both hemispheres or even mostly in the right hemisphere.
These differences have led to the study of left-handedness in relation to creativity, intelligence and some neurological disorders. But contrary to popular belief, there is no solid proof that lefties are more creative or more intelligent than righties.
Left-handedness has also had an impact on history in surprising ways. Many common items, such as scissors, notebooks, desks, and kitchen utensils, are made for right-handed people. Some children were even encouraged or forced to switch hands for centuries, but this is no longer recommended.
Scientists are still studying left-handedness today because it provides clues to the development of the brain in the womb and why human brains are so varied. The reason that one out of ten people naturally prefers to use their left hand may help answer larger questions about genetics, brain function and even some neurological diseases.
The most interesting aspect of being left-handed is that it’s not that rare, it’s that after decades of research, we’re still learning why it occurs.
So, are you left-handed, right-handed or one of the few who can use both hands equally well?
MBH/PS
