People With Thin Face Are More Likely To Be Left-Handed

Posted: Apr 29 2017, 5:30am CDT | by , in News | Latest Science News

 
People with Thin Face are More Likely to be Left-Handed
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Individuals with slender jaws are about 25 percent more likely to be left-handed, says study

It is not the brain or spinal cord that determines if people are right or left-handed, but the shape of their face.

Researchers have found that left-handed people are more likely to have slender face. Precisely, 25 percent people with slender jaws tend to use their left hands to perform various tasks. Researchers have reached their surprising conclusion after analyzing more than 13,000 individuals who participated in three national surveys conducted in United States.

Slender jaw line is a common facial feature. About one in five US adults used to have slender jaws. The feature has also been associated with susceptibility to tuberculosis, a disease which affects 2 billion people today.

“Almost 2,000 years ago a Greek physician was first to identify slender jaws as a marker for TB susceptibility, and he turned out to be right! Twentieth-century studies confirmed his clinical observations, as slender facial features become recognized as one aspect of a slender physique of a TB susceptible person. The low body weight of this slender physique is still today recognized by the Centers for Disease Control and Prevention as a marker for TB susceptibility.” Study author Philippe Hujoel, a professor at University of Washington School of Dentistry said.

The study hypothesizes that genetics that shape facial features and tuberculosis susceptibility also increase the likelihood that a person will become left-handed. The reasoning behind the hypothesis is backed up by a lot of published observations. For example, UK was described as the tuberculosis capital of Western Europe and it also had a high prevalence of left-handedness and people with slender faces, while Eskimos of 19th century had tough facial features and they were typically depicted in art as right-hand dominant. The Eskimo population was also known as being resistant to tuberculosis. Whether this is more than a coincidence needs further research.

Approximately 10 to 12 percent of the world's population is left-handed. Though there is no major difference between right-handed and left-handed people when it comes to personality, lefties always experience discrimination and social stigma. They had to face problems living in right-handed world and are also paid less than their right-handed counterparts. However, there is some evidence that left-handed people are better artists and have upper hand in at least the aspect of creativity.

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Hira Bashir covers daily affairs around the world.

 

 

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